Abstract

Lactivicin compounds of formula (I) and pharmaceutically acceptable salts of the compounds of formula (I) are provided, wherein the compounds comprise antibiotics suitable for use either alone or in combination with β-lactamase inhibitors and/or additional antibiotics (including β-lactam and non-β-lactam antibiotics) in the treatment or prevention of bacterial infections.

IPC Classes  ?

• C07D 471/04 - Ortho-condensed systems
• C07D 417/14 - Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group containing three or more hetero rings
• C07D 487/04 - Ortho-condensed systems
• C07D 493/08 - Bridged systems
• C07D 471/08 - Bridged systems
• C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or
• C07D 513/04 - Ortho-condensed systems
• A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca

Abstract

Pharmaceutical combinations comprising a lactivicin such as L TV-17 of formula (I) and one or more beta-lactamase inhibitors such as avibactam are disclosed. Lactivicin L TV-17 in combination with the beta lactamase inhibitor avibactam are disclosed as synergistic against various bacterial strains. The combinations are used in methods to treat or prevent bacterial infection.

IPC Classes  ?

• A61K 31/427 - Thiazoles not condensed and containing further heterocyclic rings
• A61K 31/43 - Compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula , e.g. penicillins, penems
• A61K 31/69 - Boron compounds
• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61P 31/04 - Antibacterial agents
• C07D 409/14 - Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing three or more hetero rings
• C07D 417/14 - Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group containing three or more hetero rings
• C07D 471/08 - Bridged systems
• C07D 471/18 - Bridged systems
• C07D 499/86 - Heterocyclic compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula: , e.g. penicillins, penemsSuch ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring with only atoms other than nitrogen atoms directly attached in position 6 and a carbon atom having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical, directly attached in position 2
• C07D 499/87 - Compounds being unsubstituted in position 3 or with substituents other than only two methyl radicals attached in position 3, and with a carbon atom having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical, directly attached in position 2
• C07D 503/18 - Radicals substituted by hetero atoms or by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical by oxygen atoms
• C07F 5/02 - Boron compounds

Abstract

Pharmaceutical combinations of LTV-17 (I), a lactivicin derivative, and β-lactamase inhibitors are provided, wherein the combinations comprise antibacterial agents suitable for use in the treatment or prevention of bacterial infections.

IPC Classes  ?

• A61K 31/427 - Thiazoles not condensed and containing further heterocyclic rings
• A61K 31/4188 - 1,3-Diazoles condensed with heterocyclic ring systems, e.g. biotin, sorbinil
• A61P 31/04 - Antibacterial agents

Abstract

Lactivicin compounds of formula (I) and pharmaceutically acceptable salts of the compounds of formula (I) are provided, wherein the compounds comprise antibiotics suitable for use either alone or in combination with β-lactamase inhibitors and/or other antibiotics (including β-lactam and non-β-lactam antibiotics) in the treatment or prevention of bacterial infections.

IPC Classes  ?

• C07D 417/14 - Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group containing three or more hetero rings
• C07D 471/04 - Ortho-condensed systems
• C07D 487/04 - Ortho-condensed systems

Abstract

Lactivicin compounds of formula (I) and pharmaceutically acceptable salts of the compounds of formula (I) are provided, wherein the compounds comprise antibiotics suitable for use either alone or in combination with P-lactamase inhibitors and/or other antibiotics (including P-lactam and non-P-lactam antibiotics) in the treatment or prevention of bacterial infections.

IPC Classes  ?

• C07D 417/14 - Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group containing three or more hetero rings
• A61K 31/04 - Nitro compounds
• A61K 31/43 - Compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula , e.g. penicillins, penems
• A61K 31/69 - Boron compounds
• A61K 31/424 - Oxazoles condensed with heterocyclic ring systems, e.g. clavulanic acid
• A61K 31/427 - Thiazoles not condensed and containing further heterocyclic rings
• A61K 31/428 - Thiazoles condensed with carbocyclic rings
• A61K 31/431 - Compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula , e.g. penicillins, penems containing further heterocyclic ring systems, e.g. ticarcillin, azlocillin, oxacillin
• A61K 31/433 - Thiadiazoles
• A61K 31/437 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system containing a five-membered ring having nitrogen as a ring hetero atom, e.g. indolizine, beta-carboline
• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61K 31/454 - Non-condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a five-membered ring with nitrogen as a ring hetero atom, e.g. pimozide, domperidone
• A61K 31/4985 - Pyrazines or piperazines ortho- or peri-condensed with heterocyclic ring systems
• C07D 471/04 - Ortho-condensed systems
• C07D 471/08 - Bridged systems
• C07D 471/18 - Bridged systems
• C07D 487/04 - Ortho-condensed systems
• C07D 499/86 - Heterocyclic compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula: , e.g. penicillins, penemsSuch ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring with only atoms other than nitrogen atoms directly attached in position 6 and a carbon atom having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical, directly attached in position 2
• C07D 503/18 - Radicals substituted by hetero atoms or by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical by oxygen atoms
• C07F 5/02 - Boron compounds

Abstract

The present invention relates to a process for producing crystalline and amorphous forms of a diazabicyclooctane derivative represented by Compound (I) and methods for producing the same.

IPC Classes  ?

• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
• A61K 31/4985 - Pyrazines or piperazines ortho- or peri-condensed with heterocyclic ring systems
• C07D 471/08 - Bridged systems
• A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep

Abstract

The present invention relates to crystalline forms of a diazabicyclooctane derivative represented by Compound I, the process for producing the same and methods for using the same:

IPC Classes  ?

• C07D 471/08 - Bridged systems
• A61P 31/04 - Antibacterial agents

Abstract

The present invention relates to a pharmaceutical composition and a lyophilisate of a diazabicyclooctane derivative represented by Compound I, a process for producing the same and methods for using the same.

IPC Classes  ?

• A61K 47/26 - Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharidesDerivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin
• A61K 31/437 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system containing a five-membered ring having nitrogen as a ring hetero atom, e.g. indolizine, beta-carboline
• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61K 9/19 - Particulate form, e.g. powders lyophilised

Abstract

A compound of formula (I): 3 and M are as defined herein. Also, methods of treating bacterial infection, pharmaceutical compositions, molecular complexes and processes for preparing compounds.

IPC Classes  ?

• C07D 471/08 - Bridged systems
• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61K 31/541 - Non-condensed thiazines containing further heterocyclic rings
• A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
• A61K 31/4985 - Pyrazines or piperazines ortho- or peri-condensed with heterocyclic ring systems
• A61K 31/496 - Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
• A61K 31/553 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having at least one nitrogen and at least one oxygen as ring hetero atoms, e.g. loxapine, staurosporine
• A61K 31/55 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole
• A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or
• A61K 31/46 - 8-Azabicyclo [3.2.1] octaneDerivatives thereof, e.g. atropine, cocaine
• C07D 451/06 - Oxygen atoms
• A61K 31/444 - Non-condensed pyridinesHydrogenated derivatives thereof containing further heterocyclic ring systems containing a six-membered ring with nitrogen as a ring hetero atom, e.g. amrinone
• A61K 31/4545 - Non-condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a six-membered ring with nitrogen as a ring hetero atom, e.g. pipamperone, anabasine

Abstract

A compound of formula (I): 3 and M are as defined herein. Also, methods of treating bacterial infection, pharmaceutical compositions, molecular complexes and processes for preparing compounds.

IPC Classes  ?

• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
• A61K 31/4985 - Pyrazines or piperazines ortho- or peri-condensed with heterocyclic ring systems
• A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• A61K 31/553 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having at least one nitrogen and at least one oxygen as ring hetero atoms, e.g. loxapine, staurosporine
• A61K 31/55 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole
• A61K 31/541 - Non-condensed thiazines containing further heterocyclic rings
• A61K 31/496 - Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
• C07D 471/08 - Bridged systems
• C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or
• A61K 31/46 - 8-Azabicyclo [3.2.1] octaneDerivatives thereof, e.g. atropine, cocaine
• C07D 451/06 - Oxygen atoms
• A61K 31/444 - Non-condensed pyridinesHydrogenated derivatives thereof containing further heterocyclic ring systems containing a six-membered ring with nitrogen as a ring hetero atom, e.g. amrinone
• A61K 31/4545 - Non-condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a six-membered ring with nitrogen as a ring hetero atom, e.g. pipamperone, anabasine

Abstract

New bicyclic compounds, their preparation, and their use as antibacterial agents, either alone or in combination with an antibiotic for the treatment of infections caused by β-lactamase-producing pathogenic bacteria, are described.

IPC Classes  ?

• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
• A61K 31/4985 - Pyrazines or piperazines ortho- or peri-condensed with heterocyclic ring systems
• A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• A61K 31/553 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having at least one nitrogen and at least one oxygen as ring hetero atoms, e.g. loxapine, staurosporine
• A61K 31/55 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole
• A61K 31/541 - Non-condensed thiazines containing further heterocyclic rings
• A61K 31/496 - Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
• C07D 471/08 - Bridged systems
• C07D 451/06 - Oxygen atoms
• A61K 31/46 - 8-Azabicyclo [3.2.1] octaneDerivatives thereof, e.g. atropine, cocaine
• C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or

Abstract

A compound of formula (I): 3 and M are as defined herein. Also, methods of treating bacterial infection, pharmaceutical compositions, molecular complexes and processes for preparing compounds.

IPC Classes  ?

• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
• A61K 31/4985 - Pyrazines or piperazines ortho- or peri-condensed with heterocyclic ring systems
• A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• A61K 31/553 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having at least one nitrogen and at least one oxygen as ring hetero atoms, e.g. loxapine, staurosporine
• A61K 31/55 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole
• A61K 31/541 - Non-condensed thiazines containing further heterocyclic rings
• A61K 31/496 - Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
• C07D 471/08 - Bridged systems
• A61K 31/46 - 8-Azabicyclo [3.2.1] octaneDerivatives thereof, e.g. atropine, cocaine
• C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or
• C07D 451/06 - Oxygen atoms

Abstract

A compound of formula (I), wherein: M is hydrogen or a pharmaceutically acceptable salt-forming cation; Y is OR1 or NR2R3, and R1,R2, R3 and M are as defined herein. Also, methods of treating bacterial infection, pharmaceutical compositions, molecular complexes and processes for preparing compounds.

IPC Classes  ?

• C07D 471/08 - Bridged systems
• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61K 31/444 - Non-condensed pyridinesHydrogenated derivatives thereof containing further heterocyclic ring systems containing a six-membered ring with nitrogen as a ring hetero atom, e.g. amrinone
• A61K 31/4545 - Non-condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a six-membered ring with nitrogen as a ring hetero atom, e.g. pipamperone, anabasine
• A61K 31/4709 - Non-condensed quinolines containing further heterocyclic rings
• A61K 31/496 - Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin

Abstract

A compound of formula (I): 1 and M are as defined herein. Also, methods of treating bacterial infection, pharmaceutical compositions, molecular complexes and processes for preparing compounds.

IPC Classes  ?

• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
• A61K 31/4985 - Pyrazines or piperazines ortho- or peri-condensed with heterocyclic ring systems
• A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• A61K 31/553 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having at least one nitrogen and at least one oxygen as ring hetero atoms, e.g. loxapine, staurosporine
• A61K 31/55 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole
• A61K 31/541 - Non-condensed thiazines containing further heterocyclic rings
• A61K 31/496 - Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
• C07D 471/08 - Bridged systems
• C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or
• A61K 31/46 - 8-Azabicyclo [3.2.1] octaneDerivatives thereof, e.g. atropine, cocaine
• C07D 451/06 - Oxygen atoms

Abstract

A compound of formula (I): 3 and M are as defined herein. Also, methods of treating bacterial infection, pharmaceutical compositions, molecular complexes and processes for preparing compounds.

IPC Classes  ?

• A61K 31/439 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom the ring forming part of a bridged ring system, e.g. quinuclidine
• A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
• A61K 31/4985 - Pyrazines or piperazines ortho- or peri-condensed with heterocyclic ring systems
• A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• A61K 31/553 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having at least one nitrogen and at least one oxygen as ring hetero atoms, e.g. loxapine, staurosporine
• A61K 31/55 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole
• A61K 31/541 - Non-condensed thiazines containing further heterocyclic rings
• A61K 31/496 - Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
• C07D 471/08 - Bridged systems

Abstract

ABSTRACT Lactivicin compounds of formula (I) and pharmaceutically acceptable salts and solvates thereof are provided: (I) These compounds comprise improved antibacterial activity and can be used either alone or in combination with P-lactamase inhibitors and/or other antibiotics (including P -lactam and non- P - lactam antibiotics) in the treatment or prevention of bacterial infections. Date Reçue/Date Received 2024-03-15

IPC Classes  ?

• A61K 31/43 - Compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula , e.g. penicillins, penems
• A61K 31/431 - Compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula , e.g. penicillins, penems containing further heterocyclic ring systems, e.g. ticarcillin, azlocillin, oxacillin
• A61K 31/437 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system containing a five-membered ring having nitrogen as a ring hetero atom, e.g. indolizine, beta-carboline
• A61K 31/454 - Non-condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a five-membered ring with nitrogen as a ring hetero atom, e.g. pimozide, domperidone
• C07D 417/14 - Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group containing three or more hetero rings
• C07D 471/04 - Ortho-condensed systems
• C07D 471/08 - Bridged systems
• C07D 471/18 - Bridged systems
• C07D 487/04 - Ortho-condensed systems
• C07D 499/86 - Heterocyclic compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula: , e.g. penicillins, penemsSuch ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring with only atoms other than nitrogen atoms directly attached in position 6 and a carbon atom having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical, directly attached in position 2
• C07D 503/18 - Radicals substituted by hetero atoms or by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. an ester or nitrile radical by oxygen atoms
• C07F 5/02 - Boron compounds