Molecular formula
C20H23N3O4
226 compounds have this formula on CompoundList.
- Molar mass
- 369.42g/mol
- Monoisotopic mass
- 369.1689Da
- Atoms
- 50
- Elements
- 4
- Rings plus double bonds
- 11
The formula C20H23N3O4 describes a molecule made of 20 carbon atoms, 23 hydrogen atoms, 3 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 × 2065.03%12.011 × 20 = 240.220 g/mol
- H Hydrogen × 236.28%1.008 × 23 = 23.184 g/mol
- N Nitrogen × 311.37%14.007 × 3 = 42.021 g/mol
- O Oxygen × 417.32%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C20H23N3O4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 226 compounds
![5-[(4-Ethoxyphenoxy)methyl]-N-methyl-N-[(2-methylpyrazol-3-yl)methyl]furan-2-carboxamide chemical structure, C20H23N3O4, CAS 1005599-31-4](/s/BTGOOXNOYWDEGE-UHFFFAOYSA-N.svg)
5-[(4-Ethoxyphenoxy)methyl]-N-methyl-N-[(2-methylpyrazol-3-yl)methyl]furan-2-carboxamide
CAS 1005599-31-4C20H23N3O4
N1-(furan-2-ylmethyl)-N2-(1-isobutyryl-1,2,3,4-tetrahydroquinolin-7-yl)oxalamide
CAS 941983-55-7C20H23N3O4
Ethyl 4-(2-cyclopentylacetamido)-6-oxo-1-phenyl-1,6-dihydropyridazine-3-carboxylate
CAS 942009-76-9C20H23N3O4
![1-(2,4-Dimethoxyphenyl)-3-[(5-oxo-1-phenylpyrrolidin-3-yl)methyl]urea chemical structure, C20H23N3O4, CAS 954695-68-2](/s/GDYJVFOOIPVQSE-UHFFFAOYSA-N.svg)
1-(2,4-Dimethoxyphenyl)-3-[(5-oxo-1-phenylpyrrolidin-3-yl)methyl]urea
CAS 954695-68-2C20H23N3O4
N1-(2,3-dimethoxyphenyl)-N2-ethylindoline-1,2-dicarboxamide
CAS 1100800-18-7C20H23N3O4
![N1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-N2-(2-(dimethylamino)-2-phenylethyl)oxalamide chemical structure, C20H23N3O4, CAS 941870-57-1](/s/PJGUGLQYVXIYJF-UHFFFAOYSA-N.svg)
N1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-N2-(2-(dimethylamino)-2-phenylethyl)oxalamide
CAS 941870-57-1C20H23N3O4
![N1-(benzo[d][1,3]dioxol-5-ylmethyl)-N2-(2-(dimethylamino)-2-phenylethyl)oxalamide chemical structure, C20H23N3O4, CAS 941975-84-4](/s/ATDQENSJCHTKKA-UHFFFAOYSA-N.svg)
N1-(benzo[d][1,3]dioxol-5-ylmethyl)-N2-(2-(dimethylamino)-2-phenylethyl)oxalamide
CAS 941975-84-4C20H23N3O4
![N1-(benzo[d][1,3]dioxol-5-yl)-N2-(2-(dimethylamino)-2-(p-tolyl)ethyl)oxalamide chemical structure, C20H23N3O4, CAS 941932-56-5](/s/UNIPRUREMJVEPQ-UHFFFAOYSA-N.svg)
N1-(benzo[d][1,3]dioxol-5-yl)-N2-(2-(dimethylamino)-2-(p-tolyl)ethyl)oxalamide
CAS 941932-56-5C20H23N3O4
N-(1-Benzyl-piperidin-4-yl)-2-methoxy-6-nitrobenzamide
CAS 773886-93-4C20H23N3O4
1-(1-(2-Methoxyacetyl)-1,2,3,4-tetrahydroquinolin-7-yl)-3-(3-methoxyphenyl)urea
CAS 1203140-25-3C20H23N3O4
![3-[1-(2-Methoxyacetyl)-1,2,3,4-tetrahydroquinolin-7-yl]-1-(2-methoxyphenyl)urea chemical structure, C20H23N3O4, CAS 1203381-24-1](/s/OLXPTZKXCZZIGS-UHFFFAOYSA-N.svg)
3-[1-(2-Methoxyacetyl)-1,2,3,4-tetrahydroquinolin-7-yl]-1-(2-methoxyphenyl)urea
CAS 1203381-24-1C20H23N3O4
(8alpha,9R)-10,11-Dihydro-6'-methoxy-5'-nitrocinchonan-9-ol
CAS 84946-09-8C20H23N3O4
4-Ethoxy-N-(1-methyl-2-oxo-5-(pyrrolidine-1-carbonyl)-1,2-dihydropyridin-3-yl)benzamide
CAS 1207056-10-7C20H23N3O4
![N-{4-[(2-Methoxybenzyl)carbamoyl]phenyl}morpholine-4-carboxamide chemical structure, C20H23N3O4, CAS 1219561-86-0](/s/PVTLRGJMDMQVAT-UHFFFAOYSA-N.svg)
N-{4-[(2-Methoxybenzyl)carbamoyl]phenyl}morpholine-4-carboxamide
CAS 1219561-86-0C20H23N3O4
Ethyl 4-(2-(2-methyl-4-oxo-5,6,7,8-tetrahydroquinazolin-3(4H)-yl)acetamido)benzoate
CAS 1251570-68-9C20H23N3O4
![N-{4-[2-(4-Hydroxypiperidin-1-yl)-2-oxoethyl]phenyl}-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxamide chemical structure, C20H23N3O4, CAS 1234922-41-8](/s/IRDAUNPFHAJVMD-UHFFFAOYSA-N.svg)
N-{4-[2-(4-Hydroxypiperidin-1-yl)-2-oxoethyl]phenyl}-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxamide
CAS 1234922-41-8C20H23N3O4
![N-(5-Ethyl-3,3-dimethyl-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]oxazepin-8-yl)-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxamide chemical structure, C20H23N3O4, CAS 1324694-55-4](/s/MGCJAXQCCGCCPO-UHFFFAOYSA-N.svg)
N-(5-Ethyl-3,3-dimethyl-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]oxazepin-8-yl)-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxamide
CAS 1324694-55-4C20H23N3O4
![N-(Bicyclo[2.2.1]hept-5-en-2-ylmethyl)-2-(7,8-dimethoxy-1-oxophthalazin-2(1H)-yl)acetamide chemical structure, C20H23N3O4, CAS 1350997-19-1](/s/UQAGHUKJCHLUCS-UHFFFAOYSA-N.svg)
N-(Bicyclo[2.2.1]hept-5-en-2-ylmethyl)-2-(7,8-dimethoxy-1-oxophthalazin-2(1H)-yl)acetamide
CAS 1350997-19-1C20H23N3O4
N1-((2,5-dimethylfuran-3-yl)methyl)-N2-(4-methyl-3-(2-oxopyrrolidin-1-yl)phenyl)oxalamide
CAS 1351645-93-6C20H23N3O4
![2-[4-(5-Amino-2,4-dimethoxy-1,6-naphthyridin-7-yl)-2,6-dimethylphenoxy]ethanol chemical structure, C20H23N3O4, CAS 1044872-75-4](/s/KQSCYKBACGIINA-UHFFFAOYSA-N.svg)
2-[4-(5-Amino-2,4-dimethoxy-1,6-naphthyridin-7-yl)-2,6-dimethylphenoxy]ethanol
CAS 1044872-75-4C20H23N3O4
![(3-(1,4-Dioxa-8-azaspiro[4.5]decane-8-carbonyl)azetidin-1-yl)(1H-indol-3-yl)methanone chemical structure, C20H23N3O4, CAS 1396686-90-0](/s/MLUAZWMMWNDKSC-UHFFFAOYSA-N.svg)
(3-(1,4-Dioxa-8-azaspiro[4.5]decane-8-carbonyl)azetidin-1-yl)(1H-indol-3-yl)methanone
CAS 1396686-90-0C20H23N3O4
3-(2,5-Dimethoxyphenyl)-N-(1-(furan-2-yl)propan-2-yl)-1-methyl-1H-pyrazole-5-carboxamide
CAS 1396854-14-0C20H23N3O4
![3-(2,5-Dimethoxyphenyl)-N-[(2,5-dimethylfuran-3-yl)methyl]-1-methyl-1H-pyrazole-5-carboxamide chemical structure, C20H23N3O4, CAS 1396861-49-6](/s/PBZRYDFQLUCAJE-UHFFFAOYSA-N.svg)
3-(2,5-Dimethoxyphenyl)-N-[(2,5-dimethylfuran-3-yl)methyl]-1-methyl-1H-pyrazole-5-carboxamide
CAS 1396861-49-6C20H23N3O4
![3-(4-Hydroxy-6-methyl-2-oxopyridin-1(2H)-yl)-N-[2-(5-methoxy-1H-indol-3-yl)ethyl]propanamide chemical structure, C20H23N3O4, CAS 1574477-91-0](/s/BAUFYMHKOGKZOU-UHFFFAOYSA-N.svg)
3-(4-Hydroxy-6-methyl-2-oxopyridin-1(2H)-yl)-N-[2-(5-methoxy-1H-indol-3-yl)ethyl]propanamide
CAS 1574477-91-0C20H23N3O4
- 2-Amino-5-(4-methylphenyl)-5-[(3,4,5-trimethoxyphenyl)methyl]-4,5-dihydro-1H-imidazol-4-one1354916-25-8C20H23N3O4
- Aptazapine maleate, (R)-81729-72-8C20H23N3O4
- Aptazapine maleate, (S)-81729-74-0C20H23N3O4
- Isochroman-3-yl(3-((6-methoxypyrazin-2-yl)oxy)piperidin-1-yl)methanone2034501-89-6C20H23N3O4
- 2-(2,6-Dioxopiperidin-3-yl)-4-(2-(piperidin-4-yl)ethyl)isoindoline-1,3-dione2484741-58-2C20H23N3O4
- 2-(2,5-Dimethylphenoxy)-1-[4-(4-nitrophenyl)piperazin-1-yl]ethanone432002-17-0C20H23N3O4
- 2-(Azepan-1-yl)-N-(4-methoxyphenyl)-5-nitrobenzamide361374-66-5C20H23N3O4
- 3-Isoquinolineethanamine, 3,4-dihydro-N,N-dimethyl-1-(3-pyridinyl)-, ethanedioate (salt)83658-89-3C20H23N3O4
- 5-[(4-Ethoxyphenoxy)methyl]-N-methyl-N-[(1-methylpyrazol-3-yl)methyl]furan-2-carboxamide1005567-11-2C20H23N3O4
- 1-(3,4-Dimethoxyphenyl)-3-[1-(2-methoxyethyl)-1H-indol-3-yl]urea941902-70-1C20H23N3O4
- Ethyl 4-cyclopentaneamido-1-(4-methylphenyl)-6-oxo-1,6-dihydropyridazine-3-carboxylate941885-86-5C20H23N3O4
- 1-(3-Methoxyphenyl)-3-((1-(4-methoxyphenyl)-5-oxopyrrolidin-3-yl)methyl)urea946299-88-3C20H23N3O4
- 1-(2-Methoxyphenyl)-3-{[1-(4-methoxyphenyl)-5-oxopyrrolidin-3-yl]methyl}urea946220-09-3C20H23N3O4
- 1-(4-Methoxyphenyl)-3-((1-(4-methoxyphenyl)-5-oxopyrrolidin-3-yl)methyl)urea946351-66-2C20H23N3O4
- 1-(2-Methoxybenzyl)-3-(1-(4-methoxyphenyl)-5-oxopyrrolidin-3-yl)urea894028-35-4C20H23N3O4
- 1-(4-Methoxybenzyl)-3-(1-(4-methoxyphenyl)-5-oxopyrrolidin-3-yl)urea877640-37-4C20H23N3O4
- 1-(3,5-Dimethoxyphenyl)-3-(1-ethyl-2-oxo-1,2,3,4-tetrahydroquinolin-6-yl)urea1170913-85-5C20H23N3O4
- [(1-Cyanocyclopentyl)carbamoyl]methyl 2-[4-(2-oxopyrrolidin-1-yl)phenyl]acetate1240858-28-9C20H23N3O4
- tert-Butyl [4-(3-acetamidobenzamido)phenyl]carbamate1098068-81-5C20H23N3O4
- 4-Hydroxy-5-(pyridine-2-carbonylamino)azepane-1-carboxylic acid benzyl ester1247884-48-5C20H23N3O4
- Methyl 7-(3-(4-ethoxyphenyl)ureido)-3,4-dihydroisoquinoline-2(1H)-carboxylate1448063-72-6C20H23N3O4
- 1-(Benzo[d][1,3]dioxol-5-yl)-3-(4-(4-methoxypiperidin-1-yl)phenyl)urea1448045-63-3C20H23N3O4
- [(1-Cyanocycloheptyl)carbamoyl]methyl 2-(2-oxo-2,3-dihydro-1H-indol-3-yl)acetate1427974-17-1C20H23N3O4
- N-((1-Cyclopentyl-1,4,6,7-tetrahydropyrano[4,3-c]pyrazol-3-yl)methyl)benzo[d][1,3]dioxole-5-carboxamide1795086-07-5C20H23N3O4
- Methyl 4-{3-[(3-cyclopropyl-1,2,4-oxadiazol-5-yl)methyl]piperidine-1-carbonyl}benzoate1706006-10-1C20H23N3O4
- 2-(Benzo[d][1,3]dioxol-5-yl)-1-(3-((3-cyclopropyl-1,2,4-oxadiazol-5-yl)methyl)piperidin-1-yl)ethanone1705244-13-8C20H23N3O4
- (E)-3-(3,4-Dimethoxyphenyl)-1-(3-(pyrazin-2-yloxy)piperidin-1-yl)prop-2-en-1-one2035023-39-1C20H23N3O4
- N-(5-Acetamido-2-methoxyphenyl)-2-(cyclopentyloxy)isonicotinamide2034272-04-1C20H23N3O4
- Benzyl (2-((4-(3-methoxyazetidin-1-yl)phenyl)amino)-2-oxoethyl)carbamate2034262-00-3C20H23N3O4
- 3-(1,3-Dioxo-3a,4,7,7a-tetrahydro-1H-isoindol-2(3H)-yl)-N-(4-methoxybenzyl)azetidine-1-carboxamide1904418-16-1C20H23N3O4
- Benzyl (2-(3-((6-methylpyridin-2-yl)oxy)pyrrolidin-1-yl)-2-oxoethyl)carbamate1903633-05-5C20H23N3O4
- 2-(tert-Butyl) 1-methyl 5-(pyrimidin-5-yl)-3,4-dihydroisoquinoline-1,2(1H)-dicarboxylate1629981-69-6C20H23N3O4
- Methyl 4-{4-[(2,6-dimethylpyrimidin-4-yl)oxy]piperidine-1-carbonyl}benzoate2034324-69-9C20H23N3O4
- (2,3-Dihydrobenzo[b][1,4]dioxin-2-yl)(4-((2,6-dimethylpyrimidin-4-yl)oxy)piperidin-1-yl)methanone2034558-25-1C20H23N3O4
- Benzyl (2-oxo-2-(3-(pyridin-4-yloxy)piperidin-1-yl)ethyl)carbamate2034433-78-6C20H23N3O4
- Methyl 2-(3-((2,6-dimethylpyrimidin-4-yl)oxy)piperidine-1-carbonyl)benzoate2034617-16-6C20H23N3O4
- 2-(Benzo[d][1,3]dioxol-5-yl)-1-(3-((2,6-dimethylpyrimidin-4-yl)oxy)piperidin-1-yl)ethanone2034524-85-9C20H23N3O4
- (2,3-Dihydrobenzo[b][1,4]dioxin-5-yl)(3-((2,6-dimethylpyrimidin-4-yl)oxy)piperidin-1-yl)methanone2034560-60-4C20H23N3O4
- 1-(2-(2-(2,5-Dioxopyrrolidin-1-yl)ethoxy)ethyl)-3-(naphthalen-1-ylmethyl)urea2034393-03-6C20H23N3O4
- Methyl 2-{3-[(4,6-dimethylpyrimidin-2-yl)oxy]piperidine-1-carbonyl}benzoate2097900-81-5C20H23N3O4
- 4-(1-(2-(1-Methyl-1H-indol-3-yl)acetyl)piperidin-4-yl)morpholine-3,5-dione2310154-63-1C20H23N3O4
- 1-((1R,5S)-3-(1H-Imidazol-1-yl)-8-azabicyclo[3.2.1]octan-8-yl)-2-(benzo[d][1,3]dioxol-5-yloxy)propan-1-one2319840-60-1C20H23N3O4
- 2-(2H-1,3-Benzodioxol-5-yloxy)-1-[3-(1H-pyrazol-1-yl)-8-azabicyclo[3.2.1]octan-8-yl]propan-1-one2309749-92-4C20H23N3O4
- (2-tert-Butyl-3-phenyl-1,2,4-oxadiazinan-4-yl)(4-nitrophenyl)methanone50259-99-9C20H23N3O4
- 4-Methoxy-N-[4-(4-methylpiperidin-1-yl)phenyl]-3-nitrobenzamide701225-65-2C20H23N3O4
- 4-Methoxy-N-[4-[(2-morpholin-4-ylacetyl)amino]phenyl]benzamide562867-25-8C20H23N3O4
- (3-Ethoxyphenyl)-[4-(2-methyl-4-nitrophenyl)piperazin-1-yl]methanone714279-28-4C20H23N3O4
- (R)-Benzyl 1-(methoxycarbamoyl)-1,2,3,4-tetrahydroquinolin-3-yl(methyl)carbamate166742-99-0C20H23N3O4
- N-{3-Methoxy-4-[(morpholin-4-ylacetyl)amino]phenyl}benzamide936819-81-7C20H23N3O4
- 2-(Morpholin-4-yl)-N-{4-[(phenoxyacetyl)amino]phenyl}acetamide936820-07-4C20H23N3O4
- 1-(2,3-Dimethoxyphenyl)-3-[(5-oxo-1-phenylpyrrolidin-3-yl)methyl]urea954635-74-6C20H23N3O4
- 1-(3,5-Dimethoxyphenyl)-3-[(5-oxo-1-phenylpyrrolidin-3-yl)methyl]urea954610-36-7C20H23N3O4
- 1-(3,4-Dimethoxyphenyl)-3-(5-oxo-1-(p-tolyl)pyrrolidin-3-yl)urea894021-40-0C20H23N3O4
- 1-(4-Ethoxyphenyl)-3-[1-(3-methoxyphenyl)-5-oxopyrrolidin-3-yl]urea894018-71-4C20H23N3O4
- 1-Benzyl-3-[1-(3,4-dimethoxyphenyl)-5-oxopyrrolidin-3-yl]urea894017-08-4C20H23N3O4
- 1-(2-Ethoxyphenyl)-3-[1-(4-methoxyphenyl)-5-oxopyrrolidin-3-yl]urea877640-51-2C20H23N3O4
- N,N'-[(1Z,7E)-4-Methyl-4-nitro-1,7-diphenylheptane-1,7-diylidene]dihydroxylamine7404-79-7C20H23N3O4
- 3-Amino-N-hydroxy-2-[(4-{4-[2-(hydroxymethyl)cyclopropyl]buta-1,3-diyn-1-yl}phenyl)formamido]-3-methylbutanamide2137443-06-0C20H23N3O4
- 2-(2-Methoxyethoxy)-N-((5-oxo-1-phenylpyrrolidin-3-yl)methyl)isonicotinamide2034390-62-8C20H23N3O4
- 2-{[1-(2,3-Dihydro-1,4-benzodioxine-5-carbonyl)piperidin-4-yl]methyl}-6-methyl-2,3-dihydropyridazin-3-one2097864-11-2C20H23N3O4
- 1-[(1-Cyanocyclohexyl)carbamoyl]ethyl 4-(prop-2-enamido)benzoate2361800-62-4C20H23N3O4
- N-[3-[4-[(1,3-Dioxoisoindol-2-yl)methyl]piperidin-1-yl]-3-oxopropyl]prop-2-enamide2361729-60-2C20H23N3O4
- 2-(1-(2-(2,6-Dioxopiperidin-3-yl)-1-oxoisoindolin-5-yl)piperidin-4-yl)acetaldehyde2520106-33-4C20H23N3O4
- 2-{6-[3-(2-Methoxyethoxy)phenyl]-10,13-dioxa-4,6-diazatricyclo[7.4.0.0,3,7]trideca-1(9),2,4,7-tetraen-5-yl}ethan-1-amine2770359-49-2C20H23N3O4
- N-[4-(4-Methylpiperidin-1-yl)phenyl]-2-(4-nitrophenoxy)acetamide700861-40-1C20H23N3O4
- N-[2-[3-(4-Methoxyphenyl)-1,2,4-oxadiazol-5-yl]ethyl]-N-(2-methylpropyl)-2-furancarboxamide1003748-72-8C20H23N3O4
- 4-[3,5-Bis(1,1-dimethylethyl)phenoxy]-7-nitro-2,1,3-benzoxadiazole155866-57-2C20H23N3O4
- 1-(2,5-Dimethoxyphenyl)-3-(1-(2-methoxyethyl)-1H-indol-3-yl)urea941909-06-4C20H23N3O4
- 4-(3,5-Dimethoxyphenyl)-3,4,6,7-tetrahydro-1,6-di-2-propen-1-yl-1H-pyrrolo[3,4-d]pyrimidine-2,5-dione853105-73-4C20H23N3O4
- 3-(4-Nitrophenoxy)-N-[2-(1-piperidinyl)ethyl]benzamide604813-12-9C20H23N3O4
- (2S)-2-[[3-[2-[[(2R)-2-Hydroxy-2-pyridin-3-ylethyl]amino]ethyl]-1H-indol-7-yl]oxy]propanoic acid639082-38-5C20H23N3O4
- Methyl 2-methyl-5-((4-(2-oxo-2,3-dihydro-1H-benzo[d]imidazol-1-yl)piperidin-1-yl)methyl)furan-3-carboxylate1623357-96-9C20H23N3O4
- [(1-Cyanocyclohexyl)carbamoyl]methyl 2-acetamido-3-phenylprop-2-enoate926159-92-4C20H23N3O4
- 3-{[1-(2,3-Dihydro-1,4-benzodioxine-5-carbonyl)piperidin-4-yl]methoxy}-6-methylpyridazine2380064-22-0C20H23N3O4
- 6-(2-Methoxyphenyl)-2-[1-(oxane-2-carbonyl)azetidin-3-yl]-2,3-dihydropyridazin-3-one2380097-63-0C20H23N3O4
- Methyl 2-[2-(N-ethylprop-2-enamido)acetyl]-1H,2H,3H,4H,5H-pyrido[4,3-b]indole-8-carboxylate2361895-54-5C20H23N3O4
Frequently asked questions
What is the molar mass of C20H23N3O4?
The molar mass of C20H23N3O4 is 369.42 g/mol, calculated from standard atomic weights for 20 carbon atoms, 23 hydrogen atoms, 3 nitrogen atoms and 4 oxygen atoms. The monoisotopic mass is 369.1689 Da.
How many compounds have the formula C20H23N3O4?
CompoundList lists 226 compounds with the molecular formula C20H23N3O4, including 5-[(4-Ethoxyphenoxy)methyl]-N-methyl-N-[(2-methylpyrazol-3-yl)methyl]furan-2-carboxamide, N1-(furan-2-ylmethyl)-N2-(1-isobutyryl-1,2,3,4-tetrahydroquinolin-7-yl)oxalamide, Ethyl 4-(2-cyclopentylacetamido)-6-oxo-1-phenyl-1,6-dihydropyridazine-3-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 C20H23N3O4?
C20H23N3O4 has a degree of unsaturation of 11. 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.