Molecular formula
C18H21N3O5
106 compounds have this formula on CompoundList.
- Molar mass
- 359.38g/mol
- Monoisotopic mass
- 359.1481Da
- Atoms
- 47
- Elements
- 4
- Rings plus double bonds
- 10
The formula C18H21N3O5 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 5 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 × 1860.16%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 215.89%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 311.69%14.007 × 3 = 42.021 g/mol
- O Oxygen × 522.26%15.999 × 5 = 79.995 g/mol
Look up another formula
Compounds with the formula C18H21N3O5
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 106 compounds
![N-(1,3-Benzodioxol-5-ylmethyl)-2-(2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl)acetamide chemical structure, C18H21N3O5, CAS 923761-16-4](/s/JEZPPBHAFNMHPZ-UHFFFAOYSA-N.svg)
N-(1,3-Benzodioxol-5-ylmethyl)-2-(2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl)acetamide
CAS 923761-16-4C18H21N3O5
![N-(2H-1,3-Benzodioxol-5-yl)-2-{8-methyl-2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl}acetamide chemical structure, C18H21N3O5, CAS 742113-76-4](/s/RHZYSCBNJZTEHD-UHFFFAOYSA-N.svg)
N-(2H-1,3-Benzodioxol-5-yl)-2-{8-methyl-2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl}acetamide
CAS 742113-76-4C18H21N3O5
Cyclopentyl 1,6-dimethyl-4-(4-nitrophenyl)-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate
CAS 313970-35-3C18H21N3O5
Cyclohexyl 6-methyl-4-(3-nitrophenyl)-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate
CAS 418798-00-2C18H21N3O5
![3,4-Dimethoxy-N-(5-methyl-1,2-oxazol-3-yl)-N-[(2-oxopyrrolidin-1-yl)methyl]benzamide chemical structure, C18H21N3O5, CAS 852132-31-1](/s/SLITXXLDFMORNQ-UHFFFAOYSA-N.svg)
3,4-Dimethoxy-N-(5-methyl-1,2-oxazol-3-yl)-N-[(2-oxopyrrolidin-1-yl)methyl]benzamide
CAS 852132-31-1C18H21N3O5
![Ethyl 7-[(2-pyrrolidin-1-ylacetyl)amino]-5H-[1,3]dioxolo[4,5-f]indole-6-carboxylate chemical structure, C18H21N3O5, CAS 799826-41-8](/s/UAHJOHWQUNVFHQ-UHFFFAOYSA-N.svg)
Ethyl 7-[(2-pyrrolidin-1-ylacetyl)amino]-5H-[1,3]dioxolo[4,5-f]indole-6-carboxylate
CAS 799826-41-8C18H21N3O5
![3,4-Dimethoxy-N'-{[5-(4-morpholinyl)-2-furyl]methylene}benzohydrazide chemical structure, C18H21N3O5, CAS 350478-77-2](/s/JTWREOGTSQWISL-XDHOZWIPSA-N.svg)
3,4-Dimethoxy-N'-{[5-(4-morpholinyl)-2-furyl]methylene}benzohydrazide
CAS 350478-77-2C18H21N3O5
![N-(1,3-Benzodioxol-5-yl)-2-(1-methyl-2,4-dioxo-1,3-diazaspiro[4.5]dec-3-yl)acetamide chemical structure, C18H21N3O5, CAS 876691-87-1](/s/UNUWLOIIJKJGEH-UHFFFAOYSA-N.svg)
N-(1,3-Benzodioxol-5-yl)-2-(1-methyl-2,4-dioxo-1,3-diazaspiro[4.5]dec-3-yl)acetamide
CAS 876691-87-1C18H21N3O5
![[2-(4-Amino-1,3-dimethyl-2,6-dioxopyrimidin-5-yl)-2-oxoethyl] 4-propan-2-ylbenzoate chemical structure, C18H21N3O5, CAS 749887-98-7](/s/OZMWJQBJJBSKKN-UHFFFAOYSA-N.svg)
[2-(4-Amino-1,3-dimethyl-2,6-dioxopyrimidin-5-yl)-2-oxoethyl] 4-propan-2-ylbenzoate
CAS 749887-98-7C18H21N3O5
![N-(2H-1,3-Benzodioxol-5-yl)-2-{6-methyl-2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl}acetamide chemical structure, C18H21N3O5, CAS 727706-12-9](/s/NWQLGJJRKASSGC-UHFFFAOYSA-N.svg)
N-(2H-1,3-Benzodioxol-5-yl)-2-{6-methyl-2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl}acetamide
CAS 727706-12-9C18H21N3O5
![6-{[4-(4-Nitrophenyl)piperazino]carbonyl}-3-cyclohexene-1-carboxylic acid chemical structure, C18H21N3O5, CAS 329042-69-5](/s/XWNITNJXNUOIMR-UHFFFAOYSA-N.svg)
6-{[4-(4-Nitrophenyl)piperazino]carbonyl}-3-cyclohexene-1-carboxylic acid
CAS 329042-69-5C18H21N3O5
![N-{2-[(3,4,5-Trimethoxybenzoyl)amino]ethyl}isonicotinamide chemical structure, C18H21N3O5, CAS 313981-96-3](/s/QPMXECGOIDAGPU-UHFFFAOYSA-N.svg)
N-{2-[(3,4,5-Trimethoxybenzoyl)amino]ethyl}isonicotinamide
CAS 313981-96-3C18H21N3O5
![[2-(4-Morpholin-4-ylanilino)-2-oxoethyl] 3,5-dimethyl-1,2-oxazole-4-carboxylate chemical structure, C18H21N3O5, CAS 852025-77-5](/s/QITRPVVDCMFLQW-UHFFFAOYSA-N.svg)
[2-(4-Morpholin-4-ylanilino)-2-oxoethyl] 3,5-dimethyl-1,2-oxazole-4-carboxylate
CAS 852025-77-5C18H21N3O5
![Ethyl[2-(4-nitrophenoxy)ethyl][2-(4-nitrophenyl)ethyl]amine chemical structure, C18H21N3O5, CAS 1197186-38-1](/s/DNTKZECWRGSWKD-UHFFFAOYSA-N.svg)
Ethyl[2-(4-nitrophenoxy)ethyl][2-(4-nitrophenyl)ethyl]amine
CAS 1197186-38-1C18H21N3O5
Isoxazole, 5-(5-(4-(4,5-dihydro-2-oxazolyl)-2-nitrophenoxy)pentyl)-3-methyl-
CAS 105639-10-9C18H21N3O5
Mbl-IN-3
CAS 1452395-68-4C18H21N3O5
![2-(2,5-Dioxopyrrolidin-1-yl)-N-[1-(2-methoxyacetyl)-1,2,3,4-tetrahydroquinolin-7-yl]acetamide chemical structure, C18H21N3O5, CAS 1207019-69-9](/s/OKPQMUDTNJTYAI-UHFFFAOYSA-N.svg)
2-(2,5-Dioxopyrrolidin-1-yl)-N-[1-(2-methoxyacetyl)-1,2,3,4-tetrahydroquinolin-7-yl]acetamide
CAS 1207019-69-9C18H21N3O5
Ethyl 1-(1-methyl-3-nitro-2-oxo-1,2-dihydroquinolin-4-yl)piperidine-4-carboxylate
CAS 850227-99-5C18H21N3O5
Ethyl 4-(3-(3,6-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)propanamido)benzoate
CAS 1105226-33-2C18H21N3O5
![N1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-N2-(2-(dimethylamino)-2-(furan-2-yl)ethyl)oxalamide chemical structure, C18H21N3O5, CAS 899998-93-7](/s/XFQKSZPQTHQUQD-UHFFFAOYSA-N.svg)
N1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-N2-(2-(dimethylamino)-2-(furan-2-yl)ethyl)oxalamide
CAS 899998-93-7C18H21N3O5
![2-[4-(4-Methoxyphenyl)-2,5-dioxo-1H,2H,3H,4H,5H,7H-furo[3,4-D]pyrimidin-1-yl]-N-(propan-2-yl)acetamide chemical structure, C18H21N3O5, CAS 1775375-86-4](/s/NYIWPPRMVPLODU-UHFFFAOYSA-N.svg)
2-[4-(4-Methoxyphenyl)-2,5-dioxo-1H,2H,3H,4H,5H,7H-furo[3,4-D]pyrimidin-1-yl]-N-(propan-2-yl)acetamide
CAS 1775375-86-4C18H21N3O5
2-(2-((tert-Butoxycarbonyl)(cyclopropylmethyl)amino)pyridin-4-yl)oxazole-4-carboxylic acid
CAS 1287670-29-4C18H21N3O5
Thalidomide-5-propoxyethanamine
CAS 2357107-60-7C18H21N3O5
![Methyl 4-[3-(4-carbamoylpiperidin-1-yl)-2,5-dioxopyrrolidin-1-yl]benzoate chemical structure, C18H21N3O5, CAS 313380-89-1](/s/YQFKKLYDXXZHKO-UHFFFAOYSA-N.svg)
Methyl 4-[3-(4-carbamoylpiperidin-1-yl)-2,5-dioxopyrrolidin-1-yl]benzoate
CAS 313380-89-1C18H21N3O5
- Thalidomide-O-C5-NH22307477-23-0C18H21N3O5
- N-[4-(Phenyldiazenyl)phenyl]hexopyranosylamine1474059-33-0C18H21N3O5
- 5-Acetyl-1-{[3-(4-methoxyphenyl)-2-methyltetrahydro-5-isoxazolyl]methyl}-2,4(1H,3H)-pyrimidinedione339016-46-5C18H21N3O5
- Acetic acid, ((2-methyl-6-(2-(phenylmethoxy)ethoxy)-4-pyrimidinyl)amino)oxo-, ethyl ester75274-18-9C18H21N3O5
- N-[2-(Furan-2-yl)-2-(pyrrolidin-1-yl)ethyl]-2-(2-nitrophenoxy)acetamide874399-36-7C18H21N3O5
- N'-{[4-(4-Methoxyphenyl)oxan-4-yl]methyl}-N-(1,2-oxazol-3-yl)ethanediamide1091139-51-3C18H21N3O5
- 5-(2-(6,7-Dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)-2-oxoethyl)-6-methylpyrimidine-2,4(1H,3H)-dione1170009-91-2C18H21N3O5
- 1 suppliersLenalidomide-C4-acid2338824-29-4C18H21N3O5
- N-(3,5-Dimethoxyphenyl)-4-(furan-2-carbonyl)piperazine-1-carboxamide925082-05-9C18H21N3O5
- Propanedioic acid, (acetylamino)(2-quinoxalinylmethyl)-, diethyl ester833472-97-2C18H21N3O5
- 1-[1-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2,5-dioxopyrrolidin-3-yl]piperidine-4-carboxamide895358-24-4C18H21N3O5
- Ethyl 4-[(4-hydroxy-8-methoxyquinolin-3-yl)carbonyl]piperazine-1-carboxylate1232780-83-4C18H21N3O5
- 1-(3-(Benzo[d][1,3]dioxol-5-yl)pyrrolidine-1-carbonyl)-4-ethylpiperazine-2,3-dione2034341-45-0C18H21N3O5
- Parp1-IN-92494000-71-2C18H21N3O5
- 6-(3,4-Dimethoxyphenyl)-2-(2-morpholino-2-oxoethyl)pyridazin-3(2H)-one899752-93-3C18H21N3O5
- 6-(2,5-Dimethoxyphenyl)-2-(2-morpholino-2-oxoethyl)pyridazin-3(2H)-one899968-27-5C18H21N3O5
- 6-(Prop-2-en-1-yl)-4-(3,4,5-trimethoxyphenyl)-1H,2H,3H,4H,5H,6H,7H-pyrrolo[3,4-d]pyrimidine-2,5-dione874594-24-8C18H21N3O5
- N1-(benzo[d][1,3]dioxol-5-ylmethyl)-N2-(2-(dimethylamino)-2-(furan-2-yl)ethyl)oxalamide941932-24-7C18H21N3O5
- 2-(5-(Benzo[d][1,3]dioxol-5-yl)isoxazol-3-yl)-N-(2-morpholinoethyl)acetamide1105205-89-7C18H21N3O5
- 2-(Cyclopropanecarboxamido)-N-(3,4-dimethoxyphenethyl)oxazole-4-carboxamide1351612-34-4C18H21N3O5
- 8-{[(3-Nitroquinolin-4-yl)amino]methyl}-1,4-dioxaspiro[4.5]decan-8-ol879514-22-4C18H21N3O5
- 4-(((1-(Cyanomethyl)piperidin-4-yl)methoxy)methyl)benzonitrile oxalate1396872-90-4C18H21N3O5
- N-tert-Butoxycarbonyl-N-[4-(glycylamino)phenyl]-2-furamide1905922-36-2C18H21N3O5
- (4-(Furan-2-carbonyl)piperazin-1-yl)(2-(2-methoxyethoxy)pyridin-4-yl)methanone2034492-16-3C18H21N3O5
- 5-(5-Aminopentoxy)-2-(2,6-dioxo-3-piperidyl)isoindoline-1,3-dione2724269-13-8C18H21N3O5
- N-(4-Hexoxyphenyl)-2,4-dinitroaniline331673-48-4C18H21N3O5
- N-(5-(5,6-Dihydro-1,4-dioxin-2-yl)-1,3,4-oxadiazol-2-yl)-4-(pentyloxy)benzamide887876-51-9C18H21N3O5
- [1-(4-Methoxyanilino)-1-oxopropan-2-yl] 6-oxo-1-propylpyridazine-3-carboxylate1043188-39-1C18H21N3O5
- 1-(1-(3,4-Dimethoxyphenyl)-5-oxopyrrolidin-3-yl)-3-(furan-2-ylmethyl)urea877641-51-5C18H21N3O5
- N-Benzoyl-2'-deoxy-5-ethylcytidine119424-73-6C18H21N3O5
- N-(3-Methylphenyl)-2-[(3,4,5-trimethoxyphenyl)carbonyl]hydrazinecarboxamide892820-75-6C18H21N3O5
- N'-{[4-(2-Methoxyphenyl)oxan-4-yl]methyl}-N-(1,2-oxazol-3-yl)ethanediamide1091058-06-8C18H21N3O5
- Diethyl [(5-methyl-1-phenyl-1H-pyrazole-4-carbonyl)amino]propanedioate1170876-72-8C18H21N3O5
- 5-[(4-Acetylpiperazin-1-yl)carbonyl]-2-(2-methoxyethyl)-1H-isoindole-1,3(2H)-dione1144429-80-0C18H21N3O5
- Ethyl 4-[N-(1-benzofuran-2-ylcarbonyl)glycyl]piperazine-1-carboxylate1010927-45-3C18H21N3O5
- Ethyl 4-((1-((2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-1H-pyrazol-4-yl)amino)-4-oxobutanoate1797867-71-0C18H21N3O5
- Methyl 4-(2-((3-hydroxy-3-(1-methyl-1H-pyrrol-2-yl)propyl)amino)-2-oxoacetamido)benzoate1798517-50-6C18H21N3O5
- 1-((1-((2,3-Dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-1H-pyrazol-4-yl)amino)-2-methyl-1-oxopropan-2-yl acetate1705996-77-5C18H21N3O5
- tert-Butyl 3-(4-amino-1-oxoisoindolin-2-yl)-2,6-dioxopiperidine-1-carboxylate1558780-57-6C18H21N3O5
- 3-((1-(6-(Cyclopentyloxy)nicotinoyl)azetidin-3-yl)methyl)oxazolidine-2,4-dione2034523-95-8C18H21N3O5
- N-{2-[2-(2,5-Dioxopyrrolidin-1-yl)ethoxy]ethyl}-6-methoxy-1H-indole-2-carboxamide2034496-73-4C18H21N3O5
- N1-(2-hydroxy-2-phenyl-2-(tetrahydro-2H-pyran-4-yl)ethyl)-N2-(isoxazol-3-yl)oxalamide2034455-99-5C18H21N3O5
- 3-[2-Oxo-2-[2-(5-propan-2-yl-1,2,4-oxadiazol-3-yl)morpholin-4-yl]ethoxy]benzaldehyde2224554-47-4C18H21N3O5
- [(1-Cyanocyclohexyl)(methyl)carbamoyl]methyl 4-methyl-3-nitrobenzoate1311665-43-6C18H21N3O5
- 4-Amino-1-((2R,4aR,7R,8S,8aS)-8-hydroxy-2-phenylhexahydropyrano[3,2-d][1,3]dioxin-7-yl)-5-methylpyrimidin-2(1H)-one937031-52-2C18H21N3O5
- N-{3-Methoxy-4-[(morpholin-4-ylacetyl)amino]phenyl}furan-2-carboxamide936819-85-1C18H21N3O5
- 2-[(E)-{[4-(Dimethylamino)phenyl]imino}methyl]-4,5-bis(hydroxymethyl)-1-oxo-1lambda~5~-pyridin-3-yl acetate93996-25-9C18H21N3O5
- N-(2-(Benzofuran-2-yl)-2-hydroxypropyl)-4-ethyl-2,3-dioxopiperazine-1-carboxamide1903413-76-2C18H21N3O5
- 1-[(2-Methoxyphenoxy)acetyl]-N-(5-methyl-1,2-oxazol-3-yl)-L-prolinamide1217702-13-0C18H21N3O5
- N-(2-(Benzofuran-2-yl)-2-methoxyethyl)-4-ethyl-2,3-dioxopiperazine-1-carboxamide2034556-38-0C18H21N3O5
- Ketone, phenyl 3-pyridyl, O-(2-(dimethylamino)ethyl)oxime, oxalate (2:3), (Z)-66928-92-5C18H21N3O5
- Methyl {5-[(tert-butoxycarbonyl)amino]-6-oxo-2-phenylpyrimidin-1(6H)-yl}acetate356533-99-8C18H21N3O5
- 1,1-Dimethylethyl 2-[2-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)ethyl]-3-oxo-1-pyrazolidinecarboxylate1159610-69-1C18H21N3O5
- 3-[[(1,3-Dihydro-1-oxo-5-isobenzofuranyl)carbonyl]amino]-5,6-dihydro-1(2H)-pyrazinecarboxylic acid 1,1-dimethylethyl ester1799842-98-0C18H21N3O5
- tert-Butyl N-[2-(2,6-Dioxo-3-piperidyl)-1-oxo-isoindolin-4-yl]carbamate1537890-74-6C18H21N3O5
- 1 suppliersPomalidomide-C5-OH2415150-83-1C18H21N3O5
- Methyl [(2S,4S,5S)-1-benzoyl-2-cyano-5-(2-nitroethyl)piperidin-4-yl]acetate54467-99-1C18H21N3O5
- 1 suppliersPomalidomide-5'-C5-OH2736496-58-3C18H21N3O5
- N-(3,5-Dimethoxyphenyl)-3-[2-(2-methylfuran-3-carbonyl)hydrazinylidene]butanamide5797-11-5C18H21N3O5
- (E)-4-(2-{4-[(Cyclohexylcarbonyl)amino]benzoyl}hydrazino)-4-oxo-2-butenoic acid444101-62-6C18H21N3O5
- N-Butyl-N-[2-[(5-methyl-1,2-oxazol-3-yl)amino]-2-oxoethyl]-1,3-benzodioxole-5-carboxamide6004-83-7C18H21N3O5
- tert-Butyl 2-(4-(((benzyloxy)carbonyl)amino)-2-oxopyrimidin-1(2H)-yl)acetate152774-09-9C18H21N3O5
- 3-Pyridinecarboxylic acid, 1,4-dihydro-2,6-dimethyl-5-(1-(methoxyimino)ethyl)-4-(3-nitrophenyl)-, methyl ester89541-36-6C18H21N3O5
- 4-[3-(2-Aminoethoxy)propyl]-2-(2,6-dioxo-3-piperidyl)isoindoline-1,3-dione2093388-10-2C18H21N3O5
- 1 suppliersLenalidomide-CO-C4-OH2846519-09-1C18H21N3O5
- 4,6-Dimethoxy-1,3,5-triazin-2-yl 2-cyclopentyl-2-hydroxy-2-phenylacetate1392109-02-2C18H21N3O5
- 5-[[2-(2,6-Dioxo-3-piperidyl)-1-oxo-isoindolin-5-yl]amino]pentanoic acid2724270-60-2C18H21N3O5
- 2-{[(Benzyloxy)carbonyl]amino}-2-cyclopropyl-3-(4-methoxy-1H-pyrazol-1-yl)propanoic acid2138541-12-3C18H21N3O5
- 3-[3-(1-{[(Benzyloxy)carbonyl]amino}cyclopentyl)-1,2,4-oxadiazol-5-yl]propanoic acid2172429-05-7C18H21N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-(4-methylpiperazin-1-yl)oxolane-3-carboxylate2248408-10-6C18H21N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-[3-(dimethylamino)propyl]-5-oxopyrrolidine-3-carboxylate2248398-52-7C18H21N3O5
- 5-{[(tert-Butoxy)carbonyl](4,6-dimethylpyrimidin-2-yl)amino}-2-hydroxybenzoic acid2413877-74-2C18H21N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-[(cyclohexylcarbamoyl)amino]propanoate2248306-88-7C18H21N3O5
- rac-1-{[(3R,4R)-3-{[(benzyloxy)carbonyl]amino}-4-hydroxycyclopentyl]methyl}-1H-pyrazole-4-carboxylic acid2580127-88-2C18H21N3O5
- 2-{4-[(Benzyloxy)carbonyl]-5,7-dimethyl-2-oxo-1H,2H,4H,5H,6H,7H-pyrazolo[1,5-a]pyrimidin-6-yl}acetic acid2639416-29-6C18H21N3O5
- Benzyl N-[5-formyl-1-methyl-3-(2-methylpropyl)-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl]carbamate2680740-60-5C18H21N3O5
Frequently asked questions
What is the molar mass of C18H21N3O5?
The molar mass of C18H21N3O5 is 359.38 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 5 oxygen atoms. The monoisotopic mass is 359.1481 Da.
How many compounds have the formula C18H21N3O5?
CompoundList lists 106 compounds with the molecular formula C18H21N3O5, including N-(1,3-Benzodioxol-5-ylmethyl)-2-(2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl)acetamide, N-(2H-1,3-Benzodioxol-5-yl)-2-{8-methyl-2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl}acetamide, Cyclopentyl 1,6-dimethyl-4-(4-nitrophenyl)-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate. 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 C18H21N3O5?
C18H21N3O5 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.