Biotron Limited

Australia

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IPC Class
A61K 31/415 - 1,2-Diazoles 15
A61K 31/155 - Amidines (), e.g. guanidine (H2N—C(=NH)—NH2), isourea (HN=C(OH)NH2), isothiourea (HN=C(SH)—NH2) 6
A61P 31/18 - Antivirals for RNA viruses for HIV 5
C07C 279/22 - Y being a hydrogen or a carbon atom, e.g. benzoylguanidines 5
C07D 307/54 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals 5
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Status
Pending 5
Registered / In Force 11
Found results for  patents

1.

METHODS OF TREATING SARS-COV-2 INFECTION

      
Application Number 18712518
Status Pending
Filing Date 2022-11-24
First Publication Date 2025-01-09
Owner BIOTRON LIMITED (Australia)
Inventor
  • Miller, Michelle
  • Ewart, Gary Dinneen

Abstract

The present invention relates to the treatment or prevention of SARS-COV-2 infection or COVID-19. In particular, the present invention relates to the use of N-carbamimidoyl-5-(1-methyl-1H-pyrazol-4-yl)-2-naphthamide, or a pharmaceutically acceptable salt thereof, in the treatment or prevention of SARS-COV-2 infection or COVID-19.

IPC Classes  ?

2.

METHODS OF TREATING SARS-COV-2 INFECTION

      
Document Number 03238183
Status Pending
Filing Date 2022-11-24
Open to Public Date 2023-06-01
Owner BIOTROM LIMITED (Australia)
Inventor
  • Miller, Michelle
  • Ewart, Gary Dinneen

Abstract

The present invention relates to the treatment or prevention of SARS-CoV-2 infection or COVID-19. In particular, the present invention relates to the use of N-carbamimidoyl-5-(1-methyl-1H-pyrazol-4-yl)-2-naphthamide, or a pharmaceutically acceptable salt thereof, in the treatment or prevention of SARS-CoV-2 infection or COVID-19.

IPC Classes  ?

3.

METHODS OF TREATING SARS-COV-2 INFECTION

      
Application Number AU2022051405
Publication Number 2023/092180
Status In Force
Filing Date 2022-11-24
Publication Date 2023-06-01
Owner BIOTRON LIMITED (Australia)
Inventor
  • Miller, Michelle
  • Ewart, Gary Dinneen

Abstract

The present invention relates to the treatment or prevention of SARS-CoV-2 infection or COVID-19. In particular, the present invention relates to the use of N-carbamimidoyl-5-(1-methyl-1H-pyrazol-4-yl)-2-naphthamide, or a pharmaceutically acceptable salt thereof, in the treatment or prevention of SARS-CoV-2 infection or COVID-19.

IPC Classes  ?

4.

METHODS OF TREATING HIV-1 INFECTION

      
Application Number 17779067
Status Pending
Filing Date 2020-11-25
First Publication Date 2022-12-29
Owner BIOTRON LIMITED (Australia)
Inventor
  • Luscombe, Carolyn
  • Ewart, Gary
  • Miller, Michelle

Abstract

Current antiretroviral therapy (ART) is a combination of 2-3 antiretroviral agents that has been successful in reducing HIV-1 RNA in the blood, and has improved the morbidity and mortality of HIV-1 infection and AIDS. Despite potent ART, eradication of HIV-1 infection remains elusive and there is potential for persistent virus replication in viral reservoirs that may continue to drive the pathogenic disease progression. Accordingly, there is a need for agents that assist in eradicating HIV-1 infection. The present invention relates to treating HIV-1 infection by administering N-carbamimidoyl-5-(1-methylpyrazol-4-yl)naphthalene-2-carboxamide in combination with antiretroviral agents.

IPC Classes  ?

  • A61K 31/415 - 1,2-Diazoles
  • A61K 31/513 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim having oxo groups directly attached to the heterocyclic ring, e.g. cytosine
  • A61K 31/536 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and at least one oxygen as the ring hetero atoms, e.g. 1,2-oxazines ortho- or peri-condensed with carbocyclic ring systems
  • A61K 31/675 - Phosphorus compounds having nitrogen as a ring hetero atom, e.g. pyridoxal phosphate
  • A61K 31/683 - Diesters of a phosphorus acid with two hydroxy compounds, e.g. phosphatidylinositols
  • A61P 31/18 - Antivirals for RNA viruses for HIV

5.

METHODS OF TREATING HIV-1 INFECTION

      
Application Number AU2020051273
Publication Number 2021/102508
Status In Force
Filing Date 2020-11-25
Publication Date 2021-06-03
Owner BIOTRON LIMITED (Australia)
Inventor
  • Luscombe, Carolyn
  • Ewart, Gary
  • Miller, Michelle

Abstract

Current antiretroviral therapy (ART) is a combination of 2-3 antiretroviral agents that has been successful in reducing HIV-1 RNA in the blood, and has improved the morbidity and mortality of HIV-1 infection and AIDS. Despite potent ART, eradication of HIV-1 infection remains elusive and there is potential for persistent virus replication in viral reservoirs that may continue to drive the pathogenic disease progression. Accordingly, there is a need for agents that assist in eradicating HIV-1 infection. The present invention relates to treating HIV-1 infection by administering N-carbamimidoyl-5-(1-methylpyrazol-4-yl)naphthalene-2-carboxamide in combination with antiretroviral agents.

IPC Classes  ?

  • A61K 31/415 - 1,2-Diazoles
  • A61K 31/536 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and at least one oxygen as the ring hetero atoms, e.g. 1,2-oxazines ortho- or peri-condensed with carbocyclic ring systems
  • A61K 31/675 - Phosphorus compounds having nitrogen as a ring hetero atom, e.g. pyridoxal phosphate
  • A61K 31/513 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim having oxo groups directly attached to the heterocyclic ring, e.g. cytosine
  • A61P 31/18 - Antivirals for RNA viruses for HIV

6.

METHODS OF TREATING HIV-1 INFECTION

      
Document Number 03158591
Status Pending
Filing Date 2020-11-25
Open to Public Date 2021-06-03
Owner BIOTROM LIMITED (Australia)
Inventor
  • Luscombe, Carolyn
  • Ewart, Gary
  • Miller, Michelle

Abstract

Current antiretroviral therapy (ART) is a combination of 2-3 antiretroviral agents that has been successful in reducing HIV-1 RNA in the blood, and has improved the morbidity and mortality of HIV-1 infection and AIDS. Despite potent ART, eradication of HIV-1 infection remains elusive and there is potential for persistent virus replication in viral reservoirs that may continue to drive the pathogenic disease progression. Accordingly, there is a need for agents that assist in eradicating HIV-1 infection. The present invention relates to treating HIV-1 infection by administering N-carbamimidoyl-5-(1-methylpyrazol-4-yl)naphthalene-2-carboxamide in combination with antiretroviral agents.

IPC Classes  ?

  • A61K 31/415 - 1,2-Diazoles
  • A61K 31/513 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim having oxo groups directly attached to the heterocyclic ring, e.g. cytosine
  • A61K 31/536 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and at least one oxygen as the ring hetero atoms, e.g. 1,2-oxazines ortho- or peri-condensed with carbocyclic ring systems
  • A61K 31/675 - Phosphorus compounds having nitrogen as a ring hetero atom, e.g. pyridoxal phosphate
  • A61P 31/18 - Antivirals for RNA viruses for HIV

7.

Methods of treating influenza

      
Application Number 16483958
Grant Number 10918623
Status In Force
Filing Date 2018-02-07
First Publication Date 2020-03-26
Grant Date 2021-02-16
Owner Biotron Limited (Australia)
Inventor
  • Ewart, Gary
  • Luscombe, Carolyn

Abstract

The present invention relates to the treatment or prevention of influenza virus infection. In particular, the present invention relates to the use of N-carbamimidoyl-5-(1-methyl-1H-pyrazol-4-yl)-2-naphthamide, or a pharmaceutically acceptable salt thereof, in the treatment or prevention of influenza virus infection.

IPC Classes  ?

  • A61K 31/415 - 1,2-Diazoles
  • A61P 31/16 - Antivirals for RNA viruses for influenza or rhinoviruses
  • A61K 9/00 - Medicinal preparations characterised by special physical form
  • A61K 31/196 - Carboxylic acids, e.g. valproic acid having an amino group the amino group being directly attached to a ring, e.g. anthranilic acid, mefenamic acid, diclofenac, chlorambucil
  • A61K 31/215 - Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids
  • A61K 31/351 - Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom not condensed with another ring

8.

METHODS OF TREATING INFLUENZA

      
Document Number 03052503
Status Pending
Filing Date 2018-02-07
Open to Public Date 2018-08-16
Owner BIOTRON LIMITED (Australia)
Inventor
  • Ewart, Gary
  • Luscombe, Carolyn

Abstract

The present invention relates to the treatment or prevention of influenza virus infection. In particular, the present invention relates to the use of N-carbamimidoyl-5-(1-methyl- 1H-pyrazol-4-yl)-2-naphthamide, or a pharmaceutically acceptable salt thereof, in the treatment or prevention of influenza virus infection.

IPC Classes  ?

  • A61K 31/155 - Amidines (), e.g. guanidine (H2N—C(=NH)—NH2), isourea (HN=C(OH)NH2), isothiourea (HN=C(SH)—NH2)
  • A61K 31/415 - 1,2-Diazoles
  • A61P 31/16 - Antivirals for RNA viruses for influenza or rhinoviruses

9.

METHODS OF TREATING INFLUENZA

      
Application Number AU2018050085
Publication Number 2018/145148
Status In Force
Filing Date 2018-02-07
Publication Date 2018-08-16
Owner BIOTRON LIMITED (Australia)
Inventor
  • Ewart, Gary
  • Luscombe, Carolyn

Abstract

The present invention relates to the treatment or prevention of influenza virus infection. In particular, the present invention relates to the use of N-carbamimidoyl-5-(1-methyl- 1H-pyrazol-4-yl)-2-naphthamide, or a pharmaceutically acceptable salt thereof, in the treatment or prevention of influenza virus infection.

IPC Classes  ?

  • A61K 31/415 - 1,2-Diazoles
  • A61K 31/155 - Amidines (), e.g. guanidine (H2N—C(=NH)—NH2), isourea (HN=C(OH)NH2), isothiourea (HN=C(SH)—NH2)
  • A61P 31/16 - Antivirals for RNA viruses for influenza or rhinoviruses

10.

Antiviral compounds and methods

      
Application Number 15262075
Grant Number 10683263
Status In Force
Filing Date 2016-09-12
First Publication Date 2016-12-29
Grant Date 2020-06-16
Owner Biotron Limited (Australia)
Inventor
  • Ewart, Gary Dinneen
  • Best, Wayne Morris

Abstract

The present invention relates to novel compounds and compositions having antiviral activity. The invention also relates to methods for the therapeutic or prophylactic treatment of viral infections in mammals.

IPC Classes  ?

  • A61K 31/44 - Non-condensed pyridinesHydrogenated derivatives thereof
  • A61K 31/415 - 1,2-Diazoles
  • A61K 31/385 - Heterocyclic compounds having sulfur as a ring hetero atom having two or more sulfur atoms in the same ring
  • A61K 31/34 - Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having five-membered rings with one oxygen as the only ring hetero atom, e.g. isosorbide
  • A61K 31/195 - Carboxylic acids, e.g. valproic acid having an amino group
  • C07C 239/00 - Compounds containing nitrogen-to-halogen bondsHydroxylamino compounds or ethers or esters thereof
  • C07C 279/00 - Derivatives of guanidine, i.e. compounds containing the group the singly-bound nitrogen atoms not being part of nitro or nitroso groups
  • C07D 213/46 - Oxygen atoms
  • C07D 231/12 - Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
  • C07D 333/22 - Radicals substituted by doubly bound hetero atoms, or by two hetero atoms other than halogen singly bound to the same carbon atom
  • C07D 307/02 - Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
  • C07C 279/22 - Y being a hydrogen or a carbon atom, e.g. benzoylguanidines
  • C07D 213/69 - Two or more oxygen atoms
  • C07D 307/54 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
  • A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
  • C07D 231/06 - Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
  • A61K 31/155 - Amidines (), e.g. guanidine (H2N—C(=NH)—NH2), isourea (HN=C(OH)NH2), isothiourea (HN=C(SH)—NH2)
  • A61K 31/381 - Heterocyclic compounds having sulfur as a ring hetero atom having five-membered rings
  • A61K 31/4412 - Non-condensed pyridinesHydrogenated derivatives thereof having oxo groups directly attached to the heterocyclic ring

11.

Antiviral compounds and methods

      
Application Number 14071870
Grant Number 09440926
Status In Force
Filing Date 2013-11-05
First Publication Date 2014-03-06
Grant Date 2016-09-13
Owner Biotron Limited (Australia)
Inventor
  • Ewart, Gary Dinneen
  • Best, Wayne Morris

Abstract

The present invention relates to novel compounds and compositions having antiviral activity. The invention also relates to methods for the therapeutic or prophylactic treatment of viral infections in mammals.

IPC Classes  ?

  • A61K 31/415 - 1,2-Diazoles
  • C07D 231/12 - Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
  • C07D 231/06 - Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
  • C07C 279/22 - Y being a hydrogen or a carbon atom, e.g. benzoylguanidines
  • C07D 213/69 - Two or more oxygen atoms
  • C07D 307/54 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
  • C07D 333/22 - Radicals substituted by doubly bound hetero atoms, or by two hetero atoms other than halogen singly bound to the same carbon atom
  • A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca

12.

Antiviral compounds and methods

      
Application Number 11922281
Grant Number 08669280
Status In Force
Filing Date 2006-06-23
First Publication Date 2009-04-16
Grant Date 2014-03-11
Owner Biotron Limited (Australia)
Inventor
  • Ewart, Gary Dinneen
  • Best, Wayne Morris

Abstract

The present invention relates to novel compounds and compositions having antiviral activity. The invention also relates to methods for the therapeutic or prophylactic treatment of viral infections in mammals.

IPC Classes  ?

  • A61K 31/415 - 1,2-Diazoles
  • C07D 231/00 - Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
  • C07D 231/06 - Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member

13.

HEPATITIS C ANTIVIRAL COMPOSITIONS AND METHODS

      
Application Number AU2008001130
Publication Number 2009/018609
Status In Force
Filing Date 2008-08-04
Publication Date 2009-02-12
Owner BIOTRON LIMITED (Australia)
Inventor
  • Ewart, Gary, Dinneen
  • Luscombe, Carolyn, Anne
  • Miller, Michelle

Abstract

The present invention relates to novel compositions having anti-viral activity and in particular it relates to synergistic compositions active against Hepatitis C virus (HCV). The invention also relates to methods for retarding, reducing or otherwise inhibiting HCV growth and/or functional activity.

IPC Classes  ?

  • A61K 31/155 - Amidines (), e.g. guanidine (H2N—C(=NH)—NH2), isourea (HN=C(OH)NH2), isothiourea (HN=C(SH)—NH2)
  • A61K 31/167 - Amides, e.g. hydroxamic acids having aromatic rings, e.g. colchicine, atenolol, progabide having the nitrogen atom of a carboxamide group directly attached to the aromatic ring, e.g. lidocaine, paracetamol
  • A61K 31/18 - Sulfonamides
  • A61K 31/341 - Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having five-membered rings with one oxygen as the only ring hetero atom, e.g. isosorbide not condensed with another ring, e.g. ranitidine, furosemide, bufetolol, muscarine
  • A61K 31/36 - Compounds containing methylenedioxyphenyl groups, e.g. sesamin
  • A61K 31/381 - Heterocyclic compounds having sulfur as a ring hetero atom having five-membered rings
  • A61K 31/415 - 1,2-Diazoles
  • A61K 31/435 - 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
  • A61P 31/14 - Antivirals for RNA viruses

14.

ANTIVIRAL COMPOUNDS AND METHODS

      
Application Number AU2006000880
Publication Number 2006/135978
Status In Force
Filing Date 2006-06-23
Publication Date 2006-12-28
Owner BIOTRON LIMITED (Australia)
Inventor
  • Ewart, Gary, Dinneen
  • Best, Wayne, Morris

Abstract

The present invention relates to novel compounds and compositions having antiviral activity. The invention also relates to methods for the therapeutic or prophylactic treatment of viral infections in mammals.

IPC Classes  ?

  • C07C 279/22 - Y being a hydrogen or a carbon atom, e.g. benzoylguanidines
  • A61K 31/415 - 1,2-Diazoles
  • C07D 231/12 - Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
  • A61K 31/155 - Amidines (), e.g. guanidine (H2N—C(=NH)—NH2), isourea (HN=C(OH)NH2), isothiourea (HN=C(SH)—NH2)
  • A61K 31/435 - 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
  • C07D 307/54 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
  • A61K 31/341 - Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having five-membered rings with one oxygen as the only ring hetero atom, e.g. isosorbide not condensed with another ring, e.g. ranitidine, furosemide, bufetolol, muscarine
  • A61P 31/12 - Antivirals
  • C07D 317/60 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
  • A61K 31/36 - Compounds containing methylenedioxyphenyl groups, e.g. sesamin
  • A61P 31/18 - Antivirals for RNA viruses for HIV
  • C07D 333/24 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
  • A61K 31/381 - Heterocyclic compounds having sulfur as a ring hetero atom having five-membered rings
  • C07D 213/69 - Two or more oxygen atoms

15.

ANTIVIRAL COMPOUNDS AND METHODS

      
Document Number 02612403
Status In Force
Filing Date 2006-06-23
Open to Public Date 2006-12-28
Grant Date 2014-03-25
Owner BIOTRON LIMITED (Australia)
Inventor
  • Ewart, Gary Dinneen
  • Best, Wayne Morris

Abstract

The present invention relates to novel compounds and compositions having antiviral activity. The invention also relates to uses thereof for the therapeutic or prophylactic treatment of viral infections in mammals. In particular, the present invention includes compounds of Formula I, and pharmaceutical compositions and uses thereof:(see formula I)

IPC Classes  ?

  • A61K 31/155 - Amidines (), e.g. guanidine (H2N—C(=NH)—NH2), isourea (HN=C(OH)NH2), isothiourea (HN=C(SH)—NH2)
  • A61K 31/341 - Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having five-membered rings with one oxygen as the only ring hetero atom, e.g. isosorbide not condensed with another ring, e.g. ranitidine, furosemide, bufetolol, muscarine
  • A61K 31/36 - Compounds containing methylenedioxyphenyl groups, e.g. sesamin
  • A61K 31/381 - Heterocyclic compounds having sulfur as a ring hetero atom having five-membered rings
  • A61K 31/415 - 1,2-Diazoles
  • A61K 31/435 - 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
  • A61P 31/12 - Antivirals
  • A61P 31/18 - Antivirals for RNA viruses for HIV
  • C07C 279/22 - Y being a hydrogen or a carbon atom, e.g. benzoylguanidines
  • C07D 213/69 - Two or more oxygen atoms
  • C07D 231/12 - Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
  • C07D 307/54 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
  • C07D 317/60 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
  • C07D 333/24 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals

16.

ANTIVIRAL COMPOUNDS AND METHODS

      
Document Number 02529949
Status In Force
Filing Date 2004-06-26
Open to Public Date 2004-12-29
Grant Date 2013-08-06
Owner BIOTRON LIMITED (Australia)
Inventor
  • Gage, Peter William
  • Ewart, Gary Dinneen
  • Wilson, Lauren Elizabeth
  • Best, Wayne
  • Premkumar, Anita

Abstract

The invention relates to compounds having antiviral activity and methods utilising the compounds to treat viral infections.

IPC Classes  ?

  • A61K 31/16 - Amides, e.g. hydroxamic acids
  • A61K 31/165 - Amides, e.g. hydroxamic acids having aromatic rings, e.g. colchicine, atenolol, progabide
  • A61P 31/12 - Antivirals
  • C07C 279/18 - Derivatives of guanidine, i.e. compounds containing the group the singly-bound nitrogen atoms not being part of nitro or nitroso groups having nitrogen atoms of guanidine groups bound to carbon atoms of six-membered aromatic rings
  • C07C 279/22 - Y being a hydrogen or a carbon atom, e.g. benzoylguanidines
  • C07D 241/32 - (Amino-pyrazinoyl) guanidines
  • C07D 307/54 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
  • C07D 403/04 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing two hetero rings directly linked by a ring-member-to-ring- member bond