Molecular formula
C21H22N2O4
398 compounds have this formula on CompoundList.
- Molar mass
- 366.42g/mol
- Monoisotopic mass
- 366.1580Da
- Atoms
- 49
- Elements
- 4
- Rings plus double bonds
- 12
The formula C21H22N2O4 describes a molecule made of 21 carbon atoms, 22 hydrogen atoms, 2 nitrogen atoms and 4 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 × 2168.84%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 226.05%1.008 × 22 = 22.176 g/mol
- N Nitrogen × 27.65%14.007 × 2 = 28.014 g/mol
- O Oxygen × 417.47%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C21H22N2O4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 201 to 300 of 398 compounds
![N-(Benzo[d][1,3]dioxole-5-carbonyl)-N-(p-tolyl)piperidine-1-carboxamide chemical structure, C21H22N2O4, CAS 941869-81-4](/s/CFTVOIYWYODIME-UHFFFAOYSA-N.svg)
N-(Benzo[d][1,3]dioxole-5-carbonyl)-N-(p-tolyl)piperidine-1-carboxamide
CAS 941869-81-4C21H22N2O4
1-(2-((2,2-Dimethyl-2,3-dihydrobenzofuran-7-yl)oxy)acetyl)indoline-2-carboxamide
CAS 1103515-55-4C21H22N2O4
5,5-Diphenylhydantoin-3-butyric Acid Ethyl Ester
CAS 56976-65-9C21H22N2O4
![4-({[5-(Benzyloxy)-1H-indol-1-yl]acetyl}amino)butanoic acid chemical structure, C21H22N2O4, CAS 1190277-66-7](/s/YXGOPRIGXBCAFU-UHFFFAOYSA-N.svg)
4-({[5-(Benzyloxy)-1H-indol-1-yl]acetyl}amino)butanoic acid
CAS 1190277-66-7C21H22N2O4
![Methyl 4-[(3,5-dimethoxyphenyl)amino]-6-ethylquinoline-2-carboxylate chemical structure, C21H22N2O4, CAS 1206999-58-7](/s/ACFZWEKDAYHZSZ-UHFFFAOYSA-N.svg)
Methyl 4-[(3,5-dimethoxyphenyl)amino]-6-ethylquinoline-2-carboxylate
CAS 1206999-58-7C21H22N2O4
![N-(4-(2-(Cyclopropylamino)-2-oxoethyl)phenyl)-3-methyl-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide chemical structure, C21H22N2O4, CAS 1209416-21-6](/s/JWZFKUYMLICANG-UHFFFAOYSA-N.svg)
N-(4-(2-(Cyclopropylamino)-2-oxoethyl)phenyl)-3-methyl-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide
CAS 1209416-21-6C21H22N2O4
![N-{3-[5-(Benzyloxy)-1H-indol-1-yl]propanoyl}-beta-alanine chemical structure, C21H22N2O4, CAS 1219548-04-5](/s/GAMVVPPYJMSYIQ-UHFFFAOYSA-N.svg)
N-{3-[5-(Benzyloxy)-1H-indol-1-yl]propanoyl}-beta-alanine
CAS 1219548-04-5C21H22N2O4
![N-{3-[6-(Benzyloxy)-1H-indol-1-yl]propanoyl}-beta-alanine chemical structure, C21H22N2O4, CAS 1219565-35-1](/s/XOIKFTXXODOMFZ-UHFFFAOYSA-N.svg)
N-{3-[6-(Benzyloxy)-1H-indol-1-yl]propanoyl}-beta-alanine
CAS 1219565-35-1C21H22N2O4
![4-({[6-(Benzyloxy)-1H-indol-1-yl]acetyl}amino)butanoic acid chemical structure, C21H22N2O4, CAS 1219547-65-5](/s/PYLUFXDVCZMVDD-UHFFFAOYSA-N.svg)
4-({[6-(Benzyloxy)-1H-indol-1-yl]acetyl}amino)butanoic acid
CAS 1219547-65-5C21H22N2O4
![Ethyl 4-{[(4-methoxyphenyl)methyl]amino}-6-methyl-2-oxo-1,2-dihydroquinoline-3-carboxylate chemical structure, C21H22N2O4, CAS 1251670-94-6](/s/NPJNVZLKVJBZIL-UHFFFAOYSA-N.svg)
Ethyl 4-{[(4-methoxyphenyl)methyl]amino}-6-methyl-2-oxo-1,2-dihydroquinoline-3-carboxylate
CAS 1251670-94-6C21H22N2O4
![Methyl N-{3-[6-(benzyloxy)-1H-indol-1-yl]propanoyl}glycinate chemical structure, C21H22N2O4, CAS 1324092-85-4](/s/OWRAGBVMVDPAID-UHFFFAOYSA-N.svg)
Methyl N-{3-[6-(benzyloxy)-1H-indol-1-yl]propanoyl}glycinate
CAS 1324092-85-4C21H22N2O4
![Methyl N-[(2-methyl-1-oxo-3-phenyl-1,2,3,4-tetrahydroisoquinolin-4-yl)carbonyl]-beta-alaninate chemical structure, C21H22N2O4, CAS 1574516-41-8](/s/IGCOJMZOBNFNNE-UHFFFAOYSA-N.svg)
Methyl N-[(2-methyl-1-oxo-3-phenyl-1,2,3,4-tetrahydroisoquinolin-4-yl)carbonyl]-beta-alaninate
CAS 1574516-41-8C21H22N2O4
![N-[2-(4-Pyridyl)ethyl]-2-[(3,4,8-trimethyl-2-oxo-2H-chromen-7-yl)oxy]acetamide chemical structure, C21H22N2O4, CAS 1401587-98-1](/s/APAXPFKCKXSBMK-UHFFFAOYSA-N.svg)
N-[2-(4-Pyridyl)ethyl]-2-[(3,4,8-trimethyl-2-oxo-2H-chromen-7-yl)oxy]acetamide
CAS 1401587-98-1C21H22N2O4
![3-(7-Methoxy-4-methyl-2-oxo-2H-chromen-6-yl)-N-[2-(4-pyridyl)ethyl]propanamide chemical structure, C21H22N2O4, CAS 1401588-55-3](/s/WCOBZMUPLXLVEJ-UHFFFAOYSA-N.svg)
3-(7-Methoxy-4-methyl-2-oxo-2H-chromen-6-yl)-N-[2-(4-pyridyl)ethyl]propanamide
CAS 1401588-55-3C21H22N2O4
![2-[2-(6,7-Dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)-2-oxoethyl]-2,3-dihydro-1H-isoindol-1-one chemical structure, C21H22N2O4, CAS 1574404-96-8](/s/YPMJUVLNANVFAQ-UHFFFAOYSA-N.svg)
2-[2-(6,7-Dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)-2-oxoethyl]-2,3-dihydro-1H-isoindol-1-one
CAS 1574404-96-8C21H22N2O4
![2,5-Diazaspiro[3.4]octane-5-carboxylic acid, 2-(4-methoxyphenyl)-1-oxo-, phenylmethyl ester chemical structure, C21H22N2O4, CAS 914389-32-5](/s/LKJYNHXVAZMISK-UHFFFAOYSA-N.svg)
2,5-Diazaspiro[3.4]octane-5-carboxylic acid, 2-(4-methoxyphenyl)-1-oxo-, phenylmethyl ester
CAS 914389-32-5C21H22N2O4
![2-[(2-Hydroxy-3,4-dihydroquinolin-7-yl)oxy]-1-(2-phenylmorpholin-4-yl)ethanone chemical structure, C21H22N2O4, CAS 1574296-43-7](/s/SHJFEJLZRNMBCQ-UHFFFAOYSA-N.svg)
2-[(2-Hydroxy-3,4-dihydroquinolin-7-yl)oxy]-1-(2-phenylmorpholin-4-yl)ethanone
CAS 1574296-43-7C21H22N2O4
![4-({1-[2-(1H-Indol-1-yl)acetyl]piperidin-4-yl}oxy)-6-methyl-2H-pyran-2-one chemical structure, C21H22N2O4, CAS 1798640-37-5](/s/GJXKRRDDEBCDET-UHFFFAOYSA-N.svg)
4-({1-[2-(1H-Indol-1-yl)acetyl]piperidin-4-yl}oxy)-6-methyl-2H-pyran-2-one
CAS 1798640-37-5C21H22N2O4
1-Hydroxy-4-((3-(4-morpholinyl)propyl)amino)-9,10-anthracenedione
CAS 38866-14-7C21H22N2O4
![Methyl 4-((1R,5S)-3-(pyridin-3-yloxy)-8-azabicyclo[3.2.1]octane-8-carbonyl)benzoate chemical structure, C21H22N2O4, CAS 2108723-19-7](/s/HIYUQSBMVYTOJE-UHFFFAOYSA-N.svg)
Methyl 4-((1R,5S)-3-(pyridin-3-yloxy)-8-azabicyclo[3.2.1]octane-8-carbonyl)benzoate
CAS 2108723-19-7C21H22N2O4
![(2E)-2-[2-(1,3-Benzodioxol-5-yl)-3-nitropropylidene]-1,3,3-trimethyl-2,3-dihydro-1H-indole chemical structure, C21H22N2O4](/s/IVZMWOLSZWXFMQ-RGVLZGJSSA-N.svg)
(2E)-2-[2-(1,3-Benzodioxol-5-yl)-3-nitropropylidene]-1,3,3-trimethyl-2,3-dihydro-1H-indole
C21H22N2O4
1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4-aminopiperidine-4-carboxylic acid
CAS 2171979-22-7C21H22N2O4
(S)-Methyl 2-(cyclopropyl(4-methylpyridin-2-yl)methyl)-5-hydroxy-1-oxo-1,2,3,4-tetrahydroisoquinoline-7-carboxylate
CAS 2766993-11-5C21H22N2O4
![[4-[2-[4-(Aziridine-1-carbonyloxy)phenyl]propan-2-yl]phenyl] aziridine-1-carboxylate chemical structure, C21H22N2O4, CAS 908-82-7](/s/JWQPKLMMPTZVAI-UHFFFAOYSA-N.svg)
[4-[2-[4-(Aziridine-1-carbonyloxy)phenyl]propan-2-yl]phenyl] aziridine-1-carboxylate
CAS 908-82-7C21H22N2O4
- Dimethyl 1-benzyl-2-propan-2-ylbenzimidazole-5,6-dicarboxylate37391-28-9C21H22N2O4
- N-(2-Adamantyl)-5-(3-nitrophenyl)furan-2-carboxamide638151-18-5C21H22N2O4
- Acetamide, N-(6-cyano-3,4-dihydro-3-hydroxy-2,2-dimethyl-2H-1-benzopyran-4-yl)-N-(phenylmethoxy)-, trans-149654-54-6C21H22N2O4
- Diethyl 5,5-diphenyl-1,4-dihydropyrazole-3,4-dicarboxylate84695-54-5C21H22N2O4
- 2-Cyano-N-(1-phenylethyl)-3-(2,4,5-trimethoxyphenyl)prop-2-enamide478017-84-4C21H22N2O4
- Ethyl (4E)-4,5-bis(benzamido)pent-4-enoate89717-51-1C21H22N2O4
- 1-(3,4-Dimethoxyphenyl)-4-[(2,5-dimethylphenyl)methyl]pyrazine-2,3-dione898419-24-4C21H22N2O4
- N-(4-Methoxyphenyl)-2-[(1-oxo-2-propyl-1,2-dihydroisoquinolin-5-yl)oxy]acetamide903361-77-3C21H22N2O4
- N-(1-Isobutyryl-1,2,3,4-tetrahydroquinolin-7-yl)benzo[d][1,3]dioxole-5-carboxamide1027372-20-8C21H22N2O4
- N-(Furan-2-ylmethyl)-2-(2-methyl-5-((2-methylbenzyl)oxy)-4-oxopyridin-1(4H)-yl)acetamide946254-51-9C21H22N2O4
- 2-(3,4-Dimethoxyphenyl)-N-((5-(p-tolyl)isoxazol-3-yl)methyl)acetamide946210-23-7C21H22N2O4
- 4-Isopropoxy-N-((5-(3-methoxyphenyl)isoxazol-3-yl)methyl)benzamide953182-24-6C21H22N2O4
- 4-Isopropoxy-N-((5-(4-methoxyphenyl)isoxazol-3-yl)methyl)benzamide953014-61-4C21H22N2O4
- N-((5-(3,4-Dimethoxyphenyl)isoxazol-3-yl)methyl)-3,4-dimethylbenzamide953210-31-6C21H22N2O4
- N-((5-(3,4-Dimethoxyphenyl)isoxazol-3-yl)methyl)-2-(m-tolyl)acetamide953233-41-5C21H22N2O4
- 2-(5-(3,4-Dimethoxyphenyl)isoxazol-3-yl)-N-(1-phenylethyl)acetamide953158-38-8C21H22N2O4
- 2-(5-(3,4-Dimethoxyphenyl)isoxazol-3-yl)-N-(2,3-dimethylphenyl)acetamide953159-18-7C21H22N2O4
- 4-(1,3-Dioxoisoindolin-2-yl)-N-(3-isopropoxyphenyl)butanamide928975-34-2C21H22N2O4
- N-(6-Cyano-3-hydroxy-2,2-dimethyl-3,4-dihydrochromen-4-yl)-N-phenylmethoxyacetamide1027513-16-1C21H22N2O4
- 7-Benzyloxy-3-((pivaloyloxy)methyl)-3,4-dihydroquinazolin-4-one196603-88-0C21H22N2O4
- 9-Hydroxy-2-(2-hydroxyethyl)-5,11-dimethyl-6H-pyrido[4,3-b]carbazol-2-ium acetate81531-56-8C21H22N2O4
- Propyl 4-{[(5-methoxy-1H-indol-1-yl)acetyl]amino}benzoate1081136-64-2C21H22N2O4
- N-(Furan-2-ylmethyl)-2-(2-methyl-5-((4-methylbenzyl)oxy)-4-oxopyridin-1(4H)-yl)acetamide946333-25-1C21H22N2O4
- N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-1-methyl-6-oxo-2-phenylpiperidine-3-carboxamide1081136-62-0C21H22N2O4
- [2-[(2-Cyano-3-methylbutan-2-yl)amino]-2-oxoethyl] 4-(4-hydroxyphenyl)benzoate926073-04-3C21H22N2O4
- 3-[2-Hydroxy-3-(pyridin-2-ylamino)propoxy]-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one1040704-20-8C21H22N2O4
- N-(3,4-Dihydro-2H-1,5-benzodioxepin-7-yl)-1-methyl-5-oxo-2-phenylpyrrolidine-3-carboxamide1190240-96-0C21H22N2O4
- Methyl 6-ethoxy-4-[(4-ethoxyphenyl)amino]quinoline-2-carboxylate1207051-71-5C21H22N2O4
- Ethyl 4-[(2,5-dimethoxyphenyl)amino]-6-methylquinoline-2-carboxylate1030090-49-3C21H22N2O4
- Ethyl 4-((2-methoxybenzyl)amino)-8-methyl-2-oxo-1,2-dihydroquinoline-3-carboxylate1251596-07-2C21H22N2O4
- Ethyl 4-((4-methoxybenzyl)amino)-8-methyl-2-oxo-1,2-dihydroquinoline-3-carboxylate1251596-09-4C21H22N2O4
- Ethyl 4-((3-methoxybenzyl)amino)-8-methyl-2-oxo-1,2-dihydroquinoline-3-carboxylate1251609-86-5C21H22N2O4
- Ethyl 4-((2-methoxybenzyl)amino)-6-methyl-2-oxo-1,2-dihydroquinoline-3-carboxylate1251705-55-1C21H22N2O4
- Methyl 6-ethoxy-4-[(2-methoxy-5-methylphenyl)amino]quinoline-2-carboxylate1226437-12-2C21H22N2O4
- [2-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-2-phenyl-ethyl]-carbamic acid tert-butyl ester943321-52-6C21H22N2O4
- Bis(7,8-dihydro-[1,3]dioxolo[4,5-g]isoquinolin-6(5H)-yl)methane1005328-62-0C21H22N2O4
- N-[2-(5-Methoxy-1H-indol-1-yl)ethyl]-3,4-dihydro-2H-1,5-benzodioxepine-7-carboxamide1351679-61-2C21H22N2O4
- N-[2-(4-Methoxy-1H-indol-1-yl)ethyl]-3,4-dihydro-2H-1,5-benzodioxepine-7-carboxamide1351699-48-3C21H22N2O4
- Ethyl 3-(hydroxy(phenyl)methyl)-1-(4-methoxybenzyl)-1H-pyrazole-4-carboxylate1355336-07-0C21H22N2O4
- Methyl (N-(3-(3-cyclopropylpropanoyl)-6-methylpyridin-2-yl)-N-phenylcarbamoyl)formate1080675-88-2C21H22N2O4
- 3-(5-Methoxy-1H-indol-1-yl)-N-[2-(4-methoxyphenyl)-2-oxoethyl]propanamide1435994-59-4C21H22N2O4
- 3-(3,4-Dimethoxyphenyl)-N-(7-methoxyquinolin-3-yl)propanamide1363796-06-8C21H22N2O4
- 1-(2-Methoxyethyl)-N-[2-(4-methoxyphenyl)-2-oxoethyl]-1H-indole-4-carboxamide1574336-87-0C21H22N2O4
- 1-(2-Methoxyethyl)-N-[2-(4-methoxyphenyl)-2-oxoethyl]-1H-indole-5-carboxamide1574325-41-9C21H22N2O4
- 1-(2-Methoxyethyl)-N-[2-(4-methoxyphenyl)-2-oxoethyl]-1H-indole-2-carboxamide1574335-94-6C21H22N2O4
- 1-(2-Methoxyethyl)-N-[2-(4-methoxyphenyl)-2-oxoethyl]-1H-indole-6-carboxamide1574515-19-7C21H22N2O4
- 3-(4-Methoxy-1H-indol-1-yl)-N-[2-(4-methoxyphenyl)-2-oxoethyl]propanamide1435904-63-4C21H22N2O4
- N-(2-Hydroxy-3-(4-methoxyphenyl)-2-methylpropyl)-5-phenylisoxazole-3-carboxamide1396845-81-0C21H22N2O4
- (E)-3-(Furan-3-yl)-N-(6-oxo-2,3,4,12,13,13a-hexahydro-1H-pyrido[2,1-d][1,5]benzoxazocin-8-yl)prop-2-enamide1448140-77-9C21H22N2O4
- N-(2-Ethoxyphenyl)-3-oxo-3H-spiro[2-benzofuran-1,4'-piperidine]-1'-carboxamide1797642-30-8C21H22N2O4
- (6,7-Dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)(5-methoxy-1H-indol-2-yl)methanone1574391-54-0C21H22N2O4
- N1-(2-(benzofuran-2-yl)-2-hydroxypropyl)-N2-(1-phenylethyl)oxalamide2034442-16-3C21H22N2O4
- (E)-3-(Benzo[d][1,3]dioxol-5-yl)-N-(pyridin-3-yl(tetrahydro-2H-pyran-4-yl)methyl)acrylamide2034997-46-9C21H22N2O4
- 3-(1-(3-(Naphthalen-1-yl)propanoyl)piperidin-4-yl)oxazolidine-2,4-dione2034274-24-1C21H22N2O4
- Scandine Nb-oxide140701-69-5C21H22N2O4
- N1-(3-(benzofuran-2-yl)propyl)-N2-(2-methoxy-5-methylphenyl)oxalamide2034298-04-7C21H22N2O4
- N1-(3-(benzofuran-2-yl)propyl)-N2-(2-methoxybenzyl)oxalamide2034351-25-0C21H22N2O4
- 2-(Benzo[d][1,3]dioxol-5-yl)-1-((1R,5S)-3-(pyridin-3-yloxy)-8-azabicyclo[3.2.1]octan-8-yl)ethanone2108860-99-5C21H22N2O4
- Methyl 4-[3-(pyridin-2-yloxy)-8-azabicyclo[3.2.1]octane-8-carbonyl]benzoate2109446-91-3C21H22N2O4
- 3-(Diethylamino)-N-(9,10-dihydro-4-hydroxy-9,10-dioxo-1-anthracenyl)-propanamide87367-05-3C21H22N2O4
- 3-Oxovenalstonidine87387-68-6C21H22N2O4
- 2-Propenoic acid, 2-methyl-, 2-[methyl[4-[2-(4-nitrophenyl)ethenyl]phenyl]amino]ethyl ester118001-04-0C21H22N2O4
- (Z)-2-Cyano-N-(2-methoxyphenyl)-3-(3-methoxy-4-propan-2-yloxyphenyl)prop-2-enamide465510-91-2C21H22N2O4
- N-[(1Z)-1-(2-Methoxyphenyl)-3-(morpholin-4-yl)-3-oxoprop-1-en-2-yl]benzamide304001-30-7C21H22N2O4
- 4-(2,5-Dimethylbenzoyl)-3-hydroxy-1-(2-methoxyethyl)-5-(pyridin-3-yl)-2,5-dihydro-1H-pyrrol-2-one607690-08-4C21H22N2O4
- Methyl 4-Fmoc-piperazine-2-carboxylate647004-81-7C21H22N2O4
- (4E)-4-[(2,5-Dimethylphenyl)-hydroxymethylidene]-1-(2-methoxyethyl)-5-pyridin-4-ylpyrrolidine-2,3-dione607690-07-3C21H22N2O4
- (4E)-4-[(2,5-Dimethylphenyl)-hydroxymethylidene]-1-(2-methoxyethyl)-5-pyridin-3-ylpyrrolidine-2,3-dioneC21H22N2O4
- L-Tryptophan, N-((4E)-5-(2-furanyl)-3-oxo-4-pentenyl)-, methyl ester159086-07-4C21H22N2O4
- N-(2-Ethoxyphenyl)-2-((2-ethyl-1-oxo-1,2-dihydroisoquinolin-5-yl)oxy)acetamide903269-49-8C21H22N2O4
- [(1-Cyanocyclopentyl)carbamoyl]methyl 3-(5-phenylfuran-2-yl)propanoate1223240-83-2C21H22N2O4
- [(1-Cyanocyclohexyl)carbamoyl]methyl 3-methoxynaphthalene-2-carboxylate1038192-12-9C21H22N2O4
- 2,6-Dimethoxy-N-[3-(2-phenylpropan-2-yl)-1,2-oxazol-5-yl]benzamide82558-78-9C21H22N2O4
- N-[2-(Piperidin-1-ylcarbonyl)phenyl]-2,3-dihydro-1,4-benzodioxine-2-carboxamide892682-18-7C21H22N2O4
- 2-(5-(3,4-Dimethoxyphenyl)isoxazol-3-yl)-N-(4-methylbenzyl)acetamide953256-47-8C21H22N2O4
- (7-Methoxy-1-benzofuran-2-yl)[4-(2-methoxyphenyl)piperazin-1-yl]methanone932957-40-9C21H22N2O4
Frequently asked questions
What is the molar mass of C21H22N2O4?
The molar mass of C21H22N2O4 is 366.42 g/mol, calculated from standard atomic weights for 21 carbon atoms, 22 hydrogen atoms, 2 nitrogen atoms and 4 oxygen atoms. The monoisotopic mass is 366.1580 Da.
How many compounds have the formula C21H22N2O4?
CompoundList lists 398 compounds with the molecular formula C21H22N2O4, including N-(Benzo[d][1,3]dioxole-5-carbonyl)-N-(p-tolyl)piperidine-1-carboxamide, 1-(2-((2,2-Dimethyl-2,3-dihydrobenzofuran-7-yl)oxy)acetyl)indoline-2-carboxamide, 5,5-Diphenylhydantoin-3-butyric Acid Ethyl Ester. 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 C21H22N2O4?
C21H22N2O4 has a degree of unsaturation of 12. 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.