Molecular formula
C17H20N4O2
369 compounds have this formula on CompoundList.
- Molar mass
- 312.37g/mol
- Monoisotopic mass
- 312.1586Da
- Atoms
- 43
- Elements
- 4
- Rings plus double bonds
- 10
The formula C17H20N4O2 describes a molecule made of 17 carbon atoms, 20 hydrogen atoms, 4 nitrogen atoms and 2 oxygen atoms. It is written in Hill notation: carbon first, then hydrogen, then the other elements in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- C Carbon × 1765.37%12.011 × 17 = 204.187 g/mol
- H Hydrogen × 206.45%1.008 × 20 = 20.160 g/mol
- N Nitrogen × 417.94%14.007 × 4 = 56.028 g/mol
- O Oxygen × 210.24%15.999 × 2 = 31.998 g/mol
Look up another formula
Compounds with the formula C17H20N4O2
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 369 compounds
![2-[3-Oxo-5,6,7,8-tetrahydro-2(3H)-cinnolinyl]-N-[2-(4-pyridyl)ethyl]acetamide chemical structure, C17H20N4O2, CAS 1401543-08-5](/s/VYGXKOMKGOCRAK-UHFFFAOYSA-N.svg)
2-[3-Oxo-5,6,7,8-tetrahydro-2(3H)-cinnolinyl]-N-[2-(4-pyridyl)ethyl]acetamide
CAS 1401543-08-5C17H20N4O2
![N-[2-(1H-Imidazol-4-yl)ethyl]-1-(2-methoxyethyl)-1H-indole-2-carboxamide chemical structure, C17H20N4O2, CAS 1435977-20-0](/s/ATBIGTKXAMXZKU-UHFFFAOYSA-N.svg)
N-[2-(1H-Imidazol-4-yl)ethyl]-1-(2-methoxyethyl)-1H-indole-2-carboxamide
CAS 1435977-20-0C17H20N4O2
![N-{1-[3-(Pyridin-4-yl)-1,2,4-oxadiazol-5-yl]cyclohexyl}cyclopropanecarboxamide chemical structure, C17H20N4O2, CAS 1421583-95-0](/s/RINSXOWLZZBNGG-UHFFFAOYSA-N.svg)
N-{1-[3-(Pyridin-4-yl)-1,2,4-oxadiazol-5-yl]cyclohexyl}cyclopropanecarboxamide
CAS 1421583-95-0C17H20N4O2
2-(6-Oxopyridazin-1(6H)-yl)-N-((1-phenylpyrrolidin-2-yl)methyl)acetamide
CAS 1797873-96-1C17H20N4O2
(3-(1H-1,2,3-Triazol-1-yl)azetidin-1-yl)(4-phenyltetrahydro-2H-pyran-4-yl)methanone
CAS 2034430-44-7C17H20N4O2
![5-Methyl-N-[(1r,4r)-4-(pyridin-2-yloxy)cyclohexyl]pyrazine-2-carboxamide chemical structure, C17H20N4O2, CAS 2034255-02-0](/s/QJSXPCQWMATPPF-UHFFFAOYSA-N.svg)
5-Methyl-N-[(1r,4r)-4-(pyridin-2-yloxy)cyclohexyl]pyrazine-2-carboxamide
CAS 2034255-02-0C17H20N4O2
![2-(Pyridin-3-yl)-N-[(1r,4r)-4-(pyrazin-2-yloxy)cyclohexyl]acetamide chemical structure, C17H20N4O2, CAS 2034316-85-1](/s/DTBFVHJTOVYQHH-UHFFFAOYSA-N.svg)
2-(Pyridin-3-yl)-N-[(1r,4r)-4-(pyrazin-2-yloxy)cyclohexyl]acetamide
CAS 2034316-85-1C17H20N4O2
![2-Methyl-N-[(1r,4r)-4-(pyrimidin-2-yloxy)cyclohexyl]pyridine-3-carboxamide chemical structure, C17H20N4O2, CAS 2034318-94-8](/s/CKROTDKJVZJJPO-UHFFFAOYSA-N.svg)
2-Methyl-N-[(1r,4r)-4-(pyrimidin-2-yloxy)cyclohexyl]pyridine-3-carboxamide
CAS 2034318-94-8C17H20N4O2
![3-[3-(1H-Imidazol-1-yl)-8-azabicyclo[3.2.1]octane-8-carbonyl]-1-methyl-1,2-dihydropyridin-2-one chemical structure, C17H20N4O2, CAS 2320853-41-4](/s/JRCFLZRJCOZKTP-UHFFFAOYSA-N.svg)
3-[3-(1H-Imidazol-1-yl)-8-azabicyclo[3.2.1]octane-8-carbonyl]-1-methyl-1,2-dihydropyridin-2-one
CAS 2320853-41-4C17H20N4O2
2-Amino-4-(2-butan-2-ylpyrazol-3-yl)-5-oxo-4,6,7,8-tetrahydrochromene-3-carbonitrile
CAS 1855891-11-0C17H20N4O2
4-(1H-Benzimidazol-2-yl)-5-imino-1-(tetrahydro-2H-pyran-4-ylmethyl)-2,5-dihydro-1H-pyrrol-3-ol
CAS 1676069-43-4C17H20N4O2
1,3-Benzodioxole, 5-(4-((2-pyrimidinyl)amino)piperidinomethyl)-
CAS 76167-77-6C17H20N4O2
![6,12-Dimethyl-N-(2-methylpropyl)-2-oxo-1,6,8-triazatricyclo[7.4.0.0^{3,7}]trideca-3(7),4,8,10,12-pentaene-5-carboxamide chemical structure, C17H20N4O2, CAS 896817-60-0](/s/GURSIEQPPYJUEM-UHFFFAOYSA-N.svg)
6,12-Dimethyl-N-(2-methylpropyl)-2-oxo-1,6,8-triazatricyclo[7.4.0.0^{3,7}]trideca-3(7),4,8,10,12-pentaene-5-carboxamide
CAS 896817-60-0C17H20N4O2
![N,N-Diethyl-1,7-dimethyl-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyrimidine-2-carboxamide chemical structure, C17H20N4O2, CAS 900267-53-0](/s/PWRULFQPGGZISZ-UHFFFAOYSA-N.svg)
N,N-Diethyl-1,7-dimethyl-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyrimidine-2-carboxamide
CAS 900267-53-0C17H20N4O2
Imidazo(1,2-a)pyrimidine-6-carboxamide, 1,2,3,5-tetrahydro-N-butyl-5-oxo-1-phenyl-
CAS 141234-25-5C17H20N4O2
![2-Piperidino-N-[3-(2-pyrazinyloxy)phenyl]acetamide chemical structure, C17H20N4O2, CAS 866157-10-0](/s/UMZSIJLNUYSHPL-UHFFFAOYSA-N.svg)
2-Piperidino-N-[3-(2-pyrazinyloxy)phenyl]acetamide
CAS 866157-10-0C17H20N4O2
![2-[6-Oxo-3-(4-piperidin-1-ylphenyl)pyridazin-1-yl]acetamide chemical structure, C17H20N4O2, CAS 922980-77-6](/s/MRQVWSUFHYZUIX-UHFFFAOYSA-N.svg)
2-[6-Oxo-3-(4-piperidin-1-ylphenyl)pyridazin-1-yl]acetamide
CAS 922980-77-6C17H20N4O2
![N-{3-[(3,4-Dimethylbenzoyl)amino]propyl}-2-pyrazinecarboxamide chemical structure, C17H20N4O2, CAS 924968-16-1](/s/CNFPLVOLGFENCZ-UHFFFAOYSA-N.svg)
N-{3-[(3,4-Dimethylbenzoyl)amino]propyl}-2-pyrazinecarboxamide
CAS 924968-16-1C17H20N4O2
![N-(2-{[2-(Dimethylamino)ethyl]carbamoyl}phenyl)pyridine-3-carboxamide chemical structure, C17H20N4O2, CAS 947913-09-9](/s/COJHXTIGQYFDSJ-UHFFFAOYSA-N.svg)
N-(2-{[2-(Dimethylamino)ethyl]carbamoyl}phenyl)pyridine-3-carboxamide
CAS 947913-09-9C17H20N4O2
(E)-1-(3-(Benzylamino)-2-cyano-3-oxoprop-1-en-1-yl)piperidine-4-carboxamide
CAS 899376-11-5C17H20N4O2
N-(tert-Butyl)-2-(3-(5-methyl-1,3,4-oxadiazol-2-yl)-1H-indol-1-yl)acetamide
CAS 950463-91-9C17H20N4O2
![3-[(4-Amino-1,2,5-oxadiazol-3-yl)amino]-5-(4-isopropylphenyl)-2-cyclohexen-1-one chemical structure, C17H20N4O2, CAS 1087654-64-5](/s/WLKBGQHDJBMBOW-UHFFFAOYSA-N.svg)
3-[(4-Amino-1,2,5-oxadiazol-3-yl)amino]-5-(4-isopropylphenyl)-2-cyclohexen-1-one
CAS 1087654-64-5C17H20N4O2
![N-tert-Butyl-6,12-dimethyl-2-oxo-1,6,8-triazatricyclo[7.4.0.0^{3,7}]trideca-3(7),4,8,10,12-pentaene-5-carboxamide chemical structure, C17H20N4O2, CAS 946202-71-7](/s/YMRNXQNNQAOCET-UHFFFAOYSA-N.svg)
N-tert-Butyl-6,12-dimethyl-2-oxo-1,6,8-triazatricyclo[7.4.0.0^{3,7}]trideca-3(7),4,8,10,12-pentaene-5-carboxamide
CAS 946202-71-7C17H20N4O2
![N-(Butan-2-yl)-6,12-dimethyl-2-oxo-1,6,8-triazatricyclo[7.4.0.0^{3,7}]trideca-3(7),4,8,10,12-pentaene-5-carboxamide chemical structure, C17H20N4O2, CAS 946359-19-9](/s/SDASXPDBQVDUFL-UHFFFAOYSA-N.svg)
N-(Butan-2-yl)-6,12-dimethyl-2-oxo-1,6,8-triazatricyclo[7.4.0.0^{3,7}]trideca-3(7),4,8,10,12-pentaene-5-carboxamide
CAS 946359-19-9C17H20N4O2
- N-(2-{[6-(Pyrrolidin-1-yl)pyrimidin-4-yl]oxy}ethyl)benzamide1210632-86-2C17H20N4O2
- (E)-3-(Furan-2-yl)-N-((1-(pyrimidin-2-yl)piperidin-4-yl)methyl)acrylamide1235696-24-8C17H20N4O2
- 6-{4-[(4-Methylpiperazin-1-yl)carbonyl]phenoxy}pyridin-3-amine1242856-67-2C17H20N4O2
- 2-(3-Oxo-3,5,6,7,8,9-hexahydro-2H-cyclohepta[c]pyridazin-2-yl)-N-(2-pyridylmethyl)acetamide1282141-76-7C17H20N4O2
- Methyl 2-(4-benzylpiperazin-1-yl)pyrimidine-5-carboxylate1133784-12-9C17H20N4O2
- 3,5-Dimethyl-N-{[1-(propan-2-yl)-1H-benzimidazol-2-yl]methyl}-1,2-oxazole-4-carboxamide1401579-96-1C17H20N4O2
- N-{2-[(1-Methyl-3-phenylpropyl)amino]-2-oxoethyl}-2-pyrazinecarboxamide1374547-18-8C17H20N4O2
- 2-Methoxy-N-(6-(piperidin-1-yl)pyrimidin-4-yl)benzamide1705952-73-3C17H20N4O2
- 1-(4,6-Dimethyl-pyridin-2-yl)-4-(4-nitro-phenyl)-piperazine1029804-04-3C17H20N4O2
- 3-[3-(1H-Indol-6-yl)-1,2,4-oxadiazol-5-yl]-N-(2-methylpropyl)propanamide1401573-87-2C17H20N4O2
- (E)-3-(Furan-2-yl)-N-((1-(pyrazin-2-yl)piperidin-4-yl)methyl)acrylamide1396890-81-5C17H20N4O2
- 5-Oxo-N-(5-phenyl-1-propyl-1H-pyrazol-3-yl)-3-pyrrolidinecarboxamide1426402-21-2C17H20N4O2
- 1-(3-((6-Methylpyridazin-3-yl)oxy)piperidin-1-yl)-2-(pyridin-3-yl)ethanone2034226-42-9C17H20N4O2
- 3-({[2,4'-Bipyridine]-3-yl}methyl)-1-(oxan-4-yl)urea2034321-20-3C17H20N4O2
- Furan-3-yl(4-(5,6,7,8-tetrahydrocinnolin-3-yl)piperazin-1-yl)methanone1903246-59-2C17H20N4O2
- 4-((1-Acryloylazetidin-3-yl)(methyl)amino)-2-methyl-1H-indole-7-carboxamide1643568-98-2C17H20N4O2
- 4-((1-Acryloyl-3-methylazetidin-3-yl)(methyl)amino)-1H-indole-7-carboxamide1643569-08-7C17H20N4O2
- 7,8-Dimethoxy-4-(piperidin-1-yl)-5H-pyrimido[5,4-b]indole121218-49-3C17H20N4O2
- 4-Methyl-2-nitro-5-(4-phenylpiperazin-1-yl)aniline439110-85-7C17H20N4O2
- tert-Butyl N-[2-(1H-imidazo[4,5-c]quinolin-1-yl)ethyl]carbamate313350-14-0C17H20N4O2
- 2-Amino-4-(1,5-dimethyl-1H-pyrazol-4-yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile492425-48-6C17H20N4O2
- 2-(2-(5-Ethyl-1,3,4-oxadiazol-2-yl)-1H-indol-1-yl)-N-isopropylacetamide946256-87-7C17H20N4O2
- 2-(4-Oxo-4,5-dihydro-3H-pyrimido[5,4-b]indol-3-yl)-N-pentylacetamide1105203-21-1C17H20N4O2
- N-Isopentyl-2-(4-oxo-4,5-dihydro-3H-pyrimido[5,4-b]indol-3-yl)acetamide1105203-28-8C17H20N4O2
- 2-Ethyl-6-(4-phenylpiperazine-1-carbonyl)pyridazin-3(2H)-one1049525-39-4C17H20N4O2
- 2-[3-(5-Ethyl-1,3,4-oxadiazol-2-yl)-1H-indol-1-yl]-N-propylacetamide1171369-87-1C17H20N4O2
- 2-(3-(5-Ethyl-1,3,4-oxadiazol-2-yl)-1H-indol-1-yl)-N-isopropylacetamide1171414-66-6C17H20N4O2
- 1-{6-[(4-Methylphenyl)amino]pyrimidin-4-yl}piperidine-4-carboxylic acid1223881-71-7C17H20N4O2
- N-(sec-Butyl)-2-(8-methyl-4-oxo-4,5-dihydro-3H-pyrimido[5,4-b]indol-3-yl)acetamide1207051-74-8C17H20N4O2
- 6-Amino-1-benzyl-5-[(prop-2-yn-1-yl)(propyl)amino]-1,2,3,4-tetrahydropyrimidine-2,4-dione1210210-82-4C17H20N4O2
- N-(1-Cyano-1,2-dimethylpropyl)-2-(6-methyl-4-oxo-3,4-dihydroquinazolin-3-yl)acetamide1197896-76-6C17H20N4O2
- 1-{[3-(4-Methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl}-4-(prop-2-yn-1-yl)piperazine1252144-12-9C17H20N4O2
- 2-Methyl-6-(4-(m-tolyl)piperazine-1-carbonyl)pyridazin-3(2H)-one1326393-13-8C17H20N4O2
- N-(6-Methylpyridin-2-yl)-2-(3-oxo-3,5,6,7,8,9-hexahydro-2H-cyclohepta[c]pyridazin-2-yl)acetamide1282110-60-4C17H20N4O2
- 2-(3-Oxo-3,5,6,7,8,9-hexahydro-2H-cyclohepta[c]pyridazin-2-yl)-N-(pyridin-3-ylmethyl)acetamide1282141-69-8C17H20N4O2
- 2-(3-Oxo-3,5,6,7,8,9-hexahydro-2H-cyclohepta[c]pyridazin-2-yl)-N-(pyridin-4-ylmethyl)acetamide1282143-74-1C17H20N4O2
- N-(1-Cyano-3-methylbutyl)-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxamide1311577-26-0C17H20N4O2
- 1-(4-(3-(4-Aminophenoxy)pyrazin-2-yl)piperidin-1-yl)ethanone1231926-07-0C17H20N4O2
- 7-Benzyl-3-pentyl-3,7-dihydro-1H-purine-2,6-dione1000019-59-9C17H20N4O2
- 4-(Pyrimidin-2-ylamino)-N-(tetrahydro-2H-pyran-4-ylmethyl)benzamide1401582-58-8C17H20N4O2
- 2-(2,4-Dimethylpyrimido[1,2-b]indazol-3-yl)-N-(3-hydroxypropyl)acetamide1401581-21-2C17H20N4O2
- N-[2-(1H-Imidazol-4-yl)ethyl]-1-(2-methoxyethyl)-1H-indole-6-carboxamide1435993-62-6C17H20N4O2
- (E)-N-(4,6-Dimethyl-2-(pyrrolidin-1-yl)pyrimidin-5-yl)-3-(furan-2-yl)acrylamide1798397-57-5C17H20N4O2
- 2-Methoxy-N-{[4-(pyrrolidin-1-yl)pyrimidin-2-yl]methyl}benzamide1797328-39-2C17H20N4O2
- N-(1H-Imidazol-2-yl)-3-[1-(2-methoxyethyl)-1H-indol-3-yl]propanamide1574300-31-4C17H20N4O2
- N-(2-(1H-Imidazo[1,2-b]pyrazol-1-yl)ethyl)-3-(4-methoxyphenyl)propanamide1798676-13-7C17H20N4O2
- 5-{[(3,5-Dimethoxyphenyl)amino]methyl}-N-methyl-1H-pyrrolo[2,3-b]pyridin-4-amine1513858-86-0C17H20N4O2
- 2-(3-Cyano-4-methyl-2-oxo-1,2-dihydropyridin-1-yl)-N-(1-cyanocyclohexyl)-N-methylacetamide1787977-14-3C17H20N4O2
- N-(1-Cyanocycloheptyl)-2-(3-cyano-4-methyl-2-oxopyridin-1-yl)acetamide1645440-27-2C17H20N4O2
- 1-Methyl-6-oxo-N-[(1-phenylpyrrolidin-2-yl)methyl]-1,6-dihydropyridazine-3-carboxamide1705309-04-1C17H20N4O2
- 2-(Pyridin-3-yl)-N-[(1r,4r)-4-(pyrimidin-2-yloxy)cyclohexyl]acetamide2034318-64-2C17H20N4O2
- N-Phenethyl-3-(pyridazin-3-yloxy)pyrrolidine-1-carboxamide2034620-29-4C17H20N4O2
- N-(2-Oxo-2-(((4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-3-yl)methyl)amino)ethyl)benzamide2034545-98-5C17H20N4O2
- N-(4-Methoxybenzyl)-6-(pyrrolidin-1-yl)pyrimidine-4-carboxamide1909477-47-9C17H20N4O2
- 7-[(Cyclopropylmethyl)amino]-2-(3-methoxyphenyl)-6,7-dihydropyrazolo[1,5-a]pyrazin-4(5H)-one2109584-08-7C17H20N4O2
- N-(2-Methoxyphenyl)-4-methyl-2-(pyrrolidin-3-yl)pyrimidine-5-carboxamide2059476-81-0C17H20N4O2
- (4-((2,6-Dimethylpyrimidin-4-yl)oxy)piperidin-1-yl)(pyridin-2-yl)methanone2034472-78-9C17H20N4O2
- (2-Cyclopropyl-6,7-dihydropyrazolo[1,5-a]pyrazin-5(4H)-yl)(4,5,6,7-tetrahydrobenzo[d]isoxazol-3-yl)methanone2034556-31-3C17H20N4O2
- 1-(3-((4,6-Dimethylpyrimidin-2-yl)oxy)pyrrolidin-1-yl)-2-(pyridin-3-yl)ethanone2034434-71-2C17H20N4O2
- (6-(Cyclopentyloxy)pyridin-3-yl)(6,7-dihydropyrazolo[1,5-a]pyrazin-5(4H)-yl)methanone2034401-00-6C17H20N4O2
- 3-(4-Methoxyphenyl)-1-(3-(pyrimidin-2-ylamino)azetidin-1-yl)propan-1-one2176069-70-6C17H20N4O2
- 2-(4-Ethoxyphenyl)-1-(3-(pyrimidin-2-ylamino)azetidin-1-yl)ethanone2176069-86-4C17H20N4O2
- N-(2-(4-(1-Methyl-1H-pyrazol-4-yl)-3,4-dihydroisoquinolin-2(1H)-yl)-2-oxoethyl)acetamide2309774-11-4C17H20N4O2
- (4-(Dimethylamino)phenyl)(3-(pyrimidin-4-yloxy)pyrrolidin-1-yl)methanone2034396-18-2C17H20N4O2
- N-(2-(2-(1H-Pyrazol-1-yl)ethoxy)ethyl)-2-(1H-indol-1-yl)acetamide2034389-64-3C17H20N4O2
- N-(2-(2-(1H-Imidazol-1-yl)ethoxy)ethyl)-2-(1H-indol-1-yl)acetamide2034390-81-1C17H20N4O2
- 1-((6-Cyclopropylpyrimidin-4-yl)methyl)-3-(2-phenoxyethyl)urea2178771-17-8C17H20N4O2
- (2E)-N-[2-(Dimethylamino)-5,6,7,8-tetrahydroquinazolin-6-yl]-3-(furan-2-yl)prop-2-enamide2097940-13-9C17H20N4O2
- N-[(5-Cyclopropylpyridin-3-yl)methyl]-2-(4,5-dimethyl-6-oxo-1,6-dihydropyrimidin-1-yl)acetamide2097867-10-0C17H20N4O2
- N-(1-Cyanocyclopentyl)-4-methyl-2-oxo-1,3,4,5-tetrahydro-1,5-benzodiazepine-7-carboxamide2189499-96-3C17H20N4O2
- 3-(1H-Imidazol-1-yl)-8-(2-methoxypyridine-3-carbonyl)-8-azabicyclo[3.2.1]octane2309214-44-4C17H20N4O2
- 1-Methyl-3-[3-(1H-pyrazol-1-yl)-8-azabicyclo[3.2.1]octane-8-carbonyl]-1,2-dihydropyridin-2-one2320144-30-5C17H20N4O2
- 8-(5-Cyclopropyl-1,2-oxazole-3-carbonyl)-3-(1H-imidazol-1-yl)-8-azabicyclo[3.2.1]octane2309552-73-4C17H20N4O2
- N-Ethyl-N-methyl-4-(3-(pyridin-4-ylmethyl)ureido)benzamide2237266-59-8C17H20N4O2
- Starbld0012999C17H20N4O2
- 3-(Benzyloxymethyl)-1-tert-butyl-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one1359706-09-4C17H20N4O2
Frequently asked questions
What is the molar mass of C17H20N4O2?
The molar mass of C17H20N4O2 is 312.37 g/mol, calculated from standard atomic weights for 17 carbon atoms, 20 hydrogen atoms, 4 nitrogen atoms and 2 oxygen atoms. The monoisotopic mass is 312.1586 Da.
How many compounds have the formula C17H20N4O2?
CompoundList lists 369 compounds with the molecular formula C17H20N4O2, including 2-[3-Oxo-5,6,7,8-tetrahydro-2(3H)-cinnolinyl]-N-[2-(4-pyridyl)ethyl]acetamide, N-[2-(1H-Imidazol-4-yl)ethyl]-1-(2-methoxyethyl)-1H-indole-2-carboxamide, N-{1-[3-(Pyridin-4-yl)-1,2,4-oxadiazol-5-yl]cyclohexyl}cyclopropanecarboxamide. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.
What is the degree of unsaturation of C17H20N4O2?
C17H20N4O2 has a degree of unsaturation of 10. That is the total number of rings and pi bonds (a double bond counts as one, a triple bond as two) in any structure with this formula.