Molecular formula
C18H24N4O2S
114 compounds have this formula on CompoundList.
- Molar mass
- 360.48g/mol
- Monoisotopic mass
- 360.1620Da
- Atoms
- 49
- Elements
- 5
- Rings plus double bonds
- 9
The formula C18H24N4O2S describes a molecule made of 18 carbon atoms, 24 hydrogen atoms, 4 nitrogen atoms, 2 oxygen atoms and 1 sulfur atom. 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 × 1859.98%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 246.71%1.008 × 24 = 24.192 g/mol
- N Nitrogen × 415.54%14.007 × 4 = 56.028 g/mol
- O Oxygen × 28.88%15.999 × 2 = 31.998 g/mol
- S Sulfur × 18.89%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C18H24N4O2S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 114 compounds
![2-(4-{[4-(tert-Butyl)phenyl]sulfonyl}piperazino)pyrimidine chemical structure, C18H24N4O2S, CAS 866153-26-6](/s/MEIUYTIQMHSAMM-UHFFFAOYSA-N.svg)
2-(4-{[4-(tert-Butyl)phenyl]sulfonyl}piperazino)pyrimidine
CAS 866153-26-6C18H24N4O2S
![N-[(4-Cyclohexyl-5-methylsulfanyl-1,2,4-triazol-3-yl)methyl]-4-methoxybenzamide chemical structure, C18H24N4O2S, CAS 476448-29-0](/s/GPFXPPWAYYUORP-UHFFFAOYSA-N.svg)
N-[(4-Cyclohexyl-5-methylsulfanyl-1,2,4-triazol-3-yl)methyl]-4-methoxybenzamide
CAS 476448-29-0C18H24N4O2S
6-Morpholin-4-yl-3-(2-pyrrolidin-1-ylethyl)-2-thioxo-2,3-dihydroquinazolin-4(1H)-one
CAS 689768-65-8C18H24N4O2S
3-tert-Butyl-N-(5,5-dimethyl-7-oxo-4,6-dihydro-1,3-benzothiazol-2-yl)-1-methylpyrazole-5-carboxamide
CAS 606117-88-8C18H24N4O2S
![(5Z)-5-[4-(Dimethylamino)benzylidene]-2-[4-(2-hydroxyethyl)piperazin-1-yl]-1,3-thiazol-4(5H)-one chemical structure, C18H24N4O2S, CAS 376623-42-6](/s/NHVKSDMVCUUQNU-SSZFMOIBSA-N.svg)
(5Z)-5-[4-(Dimethylamino)benzylidene]-2-[4-(2-hydroxyethyl)piperazin-1-yl]-1,3-thiazol-4(5H)-one
CAS 376623-42-6C18H24N4O2S
![2-{[4-Ethyl-5-(2-hydroxyphenyl)-4H-1,2,4-triazol-3-yl]sulfanyl}-1-(4-methylpiperidin-1-yl)ethanone chemical structure, C18H24N4O2S, CAS 838881-92-8](/s/YBUNBEPFBXDRMS-UHFFFAOYSA-N.svg)
2-{[4-Ethyl-5-(2-hydroxyphenyl)-4H-1,2,4-triazol-3-yl]sulfanyl}-1-(4-methylpiperidin-1-yl)ethanone
CAS 838881-92-8C18H24N4O2S
![N-[5-(2,2-Dimethylpropyl)-1,3,4-thiadiazol-2-yl]-3-(2-methylpropanoylamino)benzamide chemical structure, C18H24N4O2S, CAS 600122-03-0](/s/RZHJNILNYBEYNQ-UHFFFAOYSA-N.svg)
N-[5-(2,2-Dimethylpropyl)-1,3,4-thiadiazol-2-yl]-3-(2-methylpropanoylamino)benzamide
CAS 600122-03-0C18H24N4O2S
3-(2-Methylpropane-2-sulfonyl)-6-(4-phenylpiperazin-1-yl)pyridazine
CAS 1040681-38-6C18H24N4O2S
3-(4-Benzylpiperazin-1-yl)-6-(propylsulfonyl)pyridazine
CAS 1105228-76-9C18H24N4O2S
N,N-Diisopropyl-2-(2-(3-phenylureido)thiazol-4-yl)acetamide
CAS 921474-57-9C18H24N4O2S
N1-(2-(1-methyl-1H-pyrrol-2-yl)-2-(pyrrolidin-1-yl)ethyl)-N2-(thiophen-2-ylmethyl)oxalamide
CAS 1049349-89-4C18H24N4O2S
2-(2-(3-Phenylureido)thiazol-4-yl)-N,N-dipropylacetamide
CAS 921486-13-7C18H24N4O2S
Thiochrome caproate
CAS 94617-29-5C18H24N4O2S
3-(4-Benzylpiperazin-1-yl)-6-(isopropylsulfonyl)pyridazine
CAS 1040680-80-5C18H24N4O2S
(E)-Ethyl 2-(2-(4-(diethylamino)benzylidene)hydrazinyl)-4-methylthiazole-5-carboxylate
CAS 307528-39-8C18H24N4O2S
![7-{Bicyclo[2.2.1]heptan-2-ylmethyl}-1-(2-methylpropyl)-5-sulfanyl-1H,2H,3H,4H-[1,3]diazino[4,5-d]pyrimidine-2,4-dione chemical structure, C18H24N4O2S, CAS 1052550-30-7](/s/AOZDGYAUXZAFJW-UHFFFAOYSA-N.svg)
7-{Bicyclo[2.2.1]heptan-2-ylmethyl}-1-(2-methylpropyl)-5-sulfanyl-1H,2H,3H,4H-[1,3]diazino[4,5-d]pyrimidine-2,4-dione
CAS 1052550-30-7C18H24N4O2S
tert-Butyl 4-(5-mercapto-4-phenyl-4H-1,2,4-triazol-3-yl)piperidine-1-carboxylate
CAS 1306738-59-9C18H24N4O2S
![5-Benzyl-2-(1,4-dioxa-8-azaspiro[4.5]dec-8-ylmethyl)-4-methyl-2,4-dihydro-3H-1,2,4-triazole-3-thione chemical structure, C18H24N4O2S, CAS 298686-65-4](/s/UDLOJODFIXFICH-UHFFFAOYSA-N.svg)
5-Benzyl-2-(1,4-dioxa-8-azaspiro[4.5]dec-8-ylmethyl)-4-methyl-2,4-dihydro-3H-1,2,4-triazole-3-thione
CAS 298686-65-4C18H24N4O2S
![2-[4-(4-tert-Butylbenzenesulfonyl)piperazin-1-yl]pyrazine chemical structure, C18H24N4O2S, CAS 1049549-65-6](/s/SCSZBRLWNTXVGC-UHFFFAOYSA-N.svg)
2-[4-(4-tert-Butylbenzenesulfonyl)piperazin-1-yl]pyrazine
CAS 1049549-65-6C18H24N4O2S
![2-[[4-Ethyl-5-(4-methoxyphenyl)-1,2,4-triazol-3-yl]sulfanyl]-1-piperidin-1-ylethanone chemical structure, C18H24N4O2S, CAS 333411-83-9](/s/DYQLMVCSWXILSA-UHFFFAOYSA-N.svg)
2-[[4-Ethyl-5-(4-methoxyphenyl)-1,2,4-triazol-3-yl]sulfanyl]-1-piperidin-1-ylethanone
CAS 333411-83-9C18H24N4O2S
![5-({[2-(Diethylamino)ethyl]amino}methylene)-1-(4-methylphenyl)-2-thioxodihydro-4,6(1H,5H)-pyrimidinedione chemical structure, C18H24N4O2S, CAS 352350-12-0](/s/QMRCNAAEMMNFFR-UHFFFAOYSA-N.svg)
5-({[2-(Diethylamino)ethyl]amino}methylene)-1-(4-methylphenyl)-2-thioxodihydro-4,6(1H,5H)-pyrimidinedione
CAS 352350-12-0C18H24N4O2S
![2-[4-(4-Butylphenyl)sulfonylpiperazin-1-yl]pyrimidine chemical structure, C18H24N4O2S, CAS 898059-39-7](/s/RLKILPLJEPYWSP-UHFFFAOYSA-N.svg)
2-[4-(4-Butylphenyl)sulfonylpiperazin-1-yl]pyrimidine
CAS 898059-39-7C18H24N4O2S
![N-[2-(4-Methoxyphenyl)-2-(1-piperidinyl)ethyl]-4-methyl-1,2,3-thiadiazole-5-carboxamide chemical structure, C18H24N4O2S, CAS 942884-10-8](/s/XBVZSPOAKIOZAJ-UHFFFAOYSA-N.svg)
N-[2-(4-Methoxyphenyl)-2-(1-piperidinyl)ethyl]-4-methyl-1,2,3-thiadiazole-5-carboxamide
CAS 942884-10-8C18H24N4O2S
(E)-1-(2-(1H-Imidazol-1-yl)ethyl)-4-((4-methylstyryl)sulfonyl)piperazine
CAS 1396891-04-5C18H24N4O2S
- N-Cyclopentyl-N-((1-methyl-1,4,5,6-tetrahydrocyclopenta[c]pyrazol-3-yl)methyl)pyridine-3-sulfonamide2034336-31-5C18H24N4O2S
- 2,4-Dimethyl-N-[(1r,4r)-4-[(4,6-dimethylpyrimidin-2-yl)oxy]cyclohexyl]-1,3-thiazole-5-carboxamide2034474-43-4C18H24N4O2S
- N-Cyclohexyl-2-{[5-(4-methoxyphenyl)-4-methyl-4H-1,2,4-triazol-3-yl]sulfanyl}acetamide484646-74-4C18H24N4O2S
- 3-(2-Methylpropanoylamino)-N-(5-pentan-3-yl-1,3,4-thiadiazol-2-yl)benzamide600640-85-5C18H24N4O2S
- N-[4-Ethyl-5-methyl-3-(piperidin-1-ylcarbonyl)thiophen-2-yl]-1-methyl-1H-pyrazole-5-carboxamide1005914-88-4C18H24N4O2S
- N-Cyclopentyl-1-ethyl-4-{[(5-ethylthiophen-3-yl)carbonyl]amino}-1H-pyrazole-3-carboxamide1006334-56-0C18H24N4O2S
- 2-[Acetyl(isopentyl)amino]-4-methyl-N-(4-pyridylmethyl)-1,3-thiazole-5-carboxamide1190287-43-4C18H24N4O2S
- 2-[Acetyl(isopentyl)amino]-4-methyl-N-(2-pyridylmethyl)-1,3-thiazole-5-carboxamide1190264-44-8C18H24N4O2S
- 2-[Acetyl(isopentyl)amino]-4-methyl-N-(3-methyl-2-pyridyl)-1,3-thiazole-5-carboxamide1219580-84-3C18H24N4O2S
- N-[(2Z)-4-tert-Butyl-1,3-thiazol-2(3H)-ylidene]-2-(3-oxo-3,5,6,7,8,9-hexahydro-2H-cyclohepta[c]pyridazin-2-yl)acetamide1282118-82-4C18H24N4O2S
- 2-[(5-Cyclopentyl-4-ethyl-4H-1,2,4-triazol-3-yl)sulfanyl]-N-(4-methoxyphenyl)acetamide891331-63-8C18H24N4O2S
- N-[3-(Cyclopentylcarbamoyl)-4-ethyl-5-methylthiophen-2-yl]-1-methyl-1H-pyrazole-5-carboxamide1005881-48-0C18H24N4O2S
- N-Pentyl-3-{2-[(phenylcarbamoyl)amino]-1,3-thiazol-4-yl}propanamide1040664-83-2C18H24N4O2S
- 1-Methyl-6-(2-(piperidin-1-yl)ethyl)-4-(thiophen-2-yl)-3,4,6,7-tetrahydro-1H-pyrrolo[3,4-d]pyrimidine-2,5-dione1170238-36-4C18H24N4O2S
- 1-(2-(4-(2-Methoxyphenyl)piperazin-1-yl)ethyl)-3-(thiophen-2-yl)urea1209725-67-6C18H24N4O2S
- N-Cycloheptyl-2-{5-[(3-methoxyphenyl)amino]-1,3,4-thiadiazol-2-yl}acetamide1286702-65-5C18H24N4O2S
- 2-(4-((Benzyloxy)methyl)piperidin-1-yl)-N-(5-methyl-1,3,4-thiadiazol-2-yl)acetamide1334370-95-4C18H24N4O2S
- 2-(1-(1H-Pyrrol-1-yl)cyclohexyl)-N-(5-(tetrahydrofuran-2-yl)-1,3,4-thiadiazol-2-yl)acetamide1435997-05-9C18H24N4O2S
- 1-Cyclobutyl-4-[4-(1H-pyrazol-1-yl)benzenesulfonyl]-1,4-diazepane2320178-97-8C18H24N4O2S
- N-(Diethoxymethyl)-3-[3-(2,5-dimethyl-1H-pyrrol-1-yl)-2-thienyl]-1H-pyrazol-5-amine1025724-92-8C18H24N4O2S
- 2-[[4-(2-Methoxyethyl)-5-phenyl-1,2,4-triazol-3-yl]sulfanyl]-1-piperidin-1-ylethanone626204-00-0C18H24N4O2S
- 4-Methyl-N-{2-[4-(pyridin-2-yl)piperazin-1-yl]ethyl}benzene-1-sulfonamide941904-87-6C18H24N4O2S
- 5-((3,5-Dimethylpiperidin-1-yl)(furan-2-yl)methyl)-2-ethylthiazolo[3,2-b][1,2,4]triazol-6-ol1009680-25-4C18H24N4O2S
- N1-(2-(dimethylamino)-2-(thiophen-2-yl)ethyl)-N2-(4-(dimethylamino)phenyl)oxalamide941976-08-5C18H24N4O2S
- 2-{1-[3-Cyano-6-cyclopropyl-2-(methylsulfanyl)pyridin-4-yl]-N-methylformamido}-N,N-diethylacetamide1100095-01-9C18H24N4O2S
- N-Cyclopentyl-N-[(5-cyclopropyl-1-methyl-1H-pyrazol-3-yl)methyl]pyridine-3-sulfonamide1795424-66-6C18H24N4O2S
- N-((1-(Tetrahydro-2H-pyran-4-yl)piperidin-4-yl)methyl)benzo[c][1,2,5]thiadiazole-5-carboxamide2034588-74-2C18H24N4O2S
- N-Cyclopentyl-N-{2-[3-(pyridin-4-yl)-1H-pyrazol-1-yl]ethyl}cyclopropanesulfonamide2034420-18-1C18H24N4O2S
- N-(1-(3-(1H-Benzo[d]imidazol-1-yl)pyrrolidin-1-yl)-4-(methylthio)-1-oxobutan-2-yl)acetamide2034207-06-0C18H24N4O2S
- N-(3,5-Dimethylphenyl)-5-(4-methylpiperazin-1-yl)sulfonyl-pyridin-2-amine7066-05-9C18H24N4O2S
- 1-(1-Ethylpyrazol-4-yl)sulfonyl-4-[(E)-3-phenylprop-2-enyl]piperazine898083-77-7C18H24N4O2S
- N-(1-Cyanocyclohexyl)-2-[4-(thiophene-2-carbonyl)piperazin-1-yl]acetamide878584-86-2C18H24N4O2S
- 1H-Imidazo[4,5-c]quinolin-4-amine, 2-ethyl-1-[5-(methylsulfonyl)pentyl]-434285-67-3C18H24N4O2S
- N-(Bicyclo[2.2.1]hept-5-en-2-ylmethyl)-2-[6-oxo-3-(thiomorpholin-4-yl)pyridazin-1(6H)-yl]acetamide1351781-21-9C18H24N4O2S
- (E)-2-(4-Methylphenyl)-N-(2-propan-2-yl-5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyridin-8-yl)ethenesulfonamide1798387-82-2C18H24N4O2S
- 4-(Methoxymethyl)-1-{1-[1-(thiophen-2-yl)cyclopentanecarbonyl]pyrrolidin-3-yl}-1H-1,2,3-triazole2097896-08-5C18H24N4O2S
- 1-Ethyl-2-(1H-imidazol-2-yl)-4-[(E)-2-(4-methylphenyl)ethenyl]sulfonylpiperazine2111908-49-5C18H24N4O2S
- N,6-dimethyl-N-(1-phenylmethanesulfonylpiperidin-4-yl)pyrimidin-4-amine2415600-84-7C18H24N4O2S
- 4-(2,7-Dimethyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-yl)-N-methylmorpholine-2-carboxamide2877690-65-6C18H24N4O2S
- N-(4,5-Dimethyl-1,3-thiazol-2-yl)-2-[4-(4-methoxyphenyl)piperazin-1-yl]acetamide946959-37-1C18H24N4O2S
- 3-Ethyl-7-(4-isopropylpiperazine-1-carbonyl)-2-thioxo-2,3-dihydroquinazolin-4(1H)-one1147534-40-4C18H24N4O2S
- tert-Butyl 4-{[6-(thiophen-2-yl)pyrimidin-4-yl]amino}piperidine-1-carboxylate2098015-94-0C18H24N4O2S
- tert-Butyl (3S)-3-methyl-4-[6-(thiophen-2-yl)pyrimidin-4-yl]piperazine-1-carboxylate2098163-25-6C18H24N4O2S
- tert-Butyl (3R)-3-methyl-4-[6-(thiophen-2-yl)pyrimidin-4-yl]piperazine-1-carboxylate2098162-62-8C18H24N4O2S
- tert-Butyl 3-{[6-(thiophen-2-yl)pyrimidin-4-yl]amino}piperidine-1-carboxylate2098105-11-2C18H24N4O2S
- tert-Butyl N-{1-[6-(thiophen-2-yl)pyrimidin-4-yl]piperidin-3-yl}carbamate2097975-04-5C18H24N4O2S
- tert-Butyl N-{1-[6-(thiophen-2-yl)pyrimidin-4-yl]piperidin-4-yl}carbamate1988786-15-7C18H24N4O2S
- tert-Butyl 4-[6-(thiophen-2-yl)pyrimidin-4-yl]-1,4-diazepane-1-carboxylate2098113-49-4C18H24N4O2S
- tert-Butyl 4-{[6-(thiophen-3-yl)pyrimidin-4-yl]amino}piperidine-1-carboxylate2098016-43-2C18H24N4O2S
- tert-Butyl (3S)-3-methyl-4-[6-(thiophen-3-yl)pyrimidin-4-yl]piperazine-1-carboxylate2098162-39-9C18H24N4O2S
- tert-Butyl (3R)-3-methyl-4-[6-(thiophen-3-yl)pyrimidin-4-yl]piperazine-1-carboxylate2098162-17-3C18H24N4O2S
- tert-Butyl 3-{[6-(thiophen-3-yl)pyrimidin-4-yl]amino}piperidine-1-carboxylate2098105-60-1C18H24N4O2S
- tert-Butyl N-{1-[6-(thiophen-3-yl)pyrimidin-4-yl]piperidin-3-yl}carbamate2098016-61-4C18H24N4O2S
- tert-Butyl N-{1-[6-(thiophen-3-yl)pyrimidin-4-yl]piperidin-4-yl}carbamate2098016-63-6C18H24N4O2S
- tert-Butyl 4-[6-(thiophen-3-yl)pyrimidin-4-yl]-1,4-diazepane-1-carboxylate2098105-89-4C18H24N4O2S
- 3-tert-Butyl-6-{[1-(1,3-thiazole-4-carbonyl)piperidin-4-yl]methoxy}pyridazine2309571-37-5C18H24N4O2S
- N-(Adamantan-1-yl)-3-oxo-4-(1,3-thiazol-2-yl)piperazine-1-carboxamide2320464-99-9C18H24N4O2S
- 3-Methoxy-N-methyl-N-{[1-(5-methylthiophene-2-carbonyl)piperidin-4-yl]methyl}pyrazin-2-amine2380078-66-8C18H24N4O2S
- N-Methyl-N-{1-[(4-methylphenyl)methanesulfonyl]piperidin-4-yl}pyrimidin-4-amine2380144-63-6C18H24N4O2S
- N-[1-(4,6-Dimethylpyrimidin-2-yl)pyrrolidin-3-yl]-N-methyl-1-phenylmethanesulfonamide2549019-74-9C18H24N4O2S
- N-[1-(5,7-Dimethyl-1,8-naphthyridin-2-yl)piperidin-3-yl]cyclopropanesulfonamide2640861-72-7C18H24N4O2S
- N-(Oxan-4-yl)-2-(1-{thieno[2,3-d]pyrimidin-4-yl}piperidin-4-yl)acetamide2877760-91-1C18H24N4O2S
- N-(Oxan-4-yl)-2-(1-{thieno[3,2-d]pyrimidin-4-yl}piperidin-4-yl)acetamide2877719-38-3C18H24N4O2S
- N-(Oxan-4-yl)-2-(1-{[1,3]thiazolo[4,5-c]pyridin-2-yl}piperidin-4-yl)acetamide2877666-81-2C18H24N4O2S
- 4-({1-[(2,4-Dimethyl-1,3-thiazol-5-yl)methyl]piperidin-4-yl}methoxy)pyridine-2-carboxamide2877701-42-1C18H24N4O2S
- N'-(5-tert-Butyl-1,3,4-thiadiazol-2-yl)-N-(2-phenylethyl)butanediamide5273-12-1C18H24N4O2S
- 1-(1-(2-(Thiomorpholin-3-yl)acetyl)piperidin-4-yl)-1H-benzo[d]imidazol-2(3H)-one1606639-74-0C18H24N4O2S
- 4-(2,3-Dihydro-2-oxo-1H-benzo[d]imidazol-1-yl)-N-(2,2-dimethyl-3-thietanyl)piperidin-1-carboxamide1950287-47-4C18H24N4O2S
- N-[1-(5,7-Dimethyl-1,8-naphthyridin-2-yl)piperidin-4-yl]cyclopropanesulfonamide2415583-32-1C18H24N4O2S
- 3-tert-Butyl-6-{[1-(2-methyl-1,3-thiazole-4-carbonyl)pyrrolidin-3-yl]methoxy}pyridazine2549043-21-0C18H24N4O2S
- 7-[4-(Cyclopropanesulfonyl)-1,4-diazepan-1-yl]-2,4-dimethyl-1,8-naphthyridine2549037-05-8C18H24N4O2S
- N-[1-(4-Methanesulfonylphenyl)piperidin-3-yl]-N,5-dimethylpyrimidin-2-amine2741910-84-7C18H24N4O2S
- N,2,4,6-tetramethyl-N-[1-(6-methylpyridazin-3-yl)azetidin-3-yl]benzene-1-sulfonamide2415500-13-7C18H24N4O2S
- 1-(2-{[4-(1,2-Benzothiazol-3-yl)piperazin-1-yl]methyl}morpholin-4-yl)ethan-1-one2742034-77-9C18H24N4O2S
- N-Methyl-N-[1-(4-methylphthalazin-1-yl)piperidin-3-yl]cyclopropanesulfonamide2742034-46-2C18H24N4O2S
- 4-(6-Cyclopropyl-1,8-naphthyridin-2-yl)-N,N-dimethylpiperidine-1-sulfonamide2741932-55-6C18H24N4O2S
Frequently asked questions
What is the molar mass of C18H24N4O2S?
The molar mass of C18H24N4O2S is 360.48 g/mol, calculated from standard atomic weights for 18 carbon atoms, 24 hydrogen atoms, 4 nitrogen atoms, 2 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 360.1620 Da.
How many compounds have the formula C18H24N4O2S?
CompoundList lists 114 compounds with the molecular formula C18H24N4O2S, including 2-(4-{[4-(tert-Butyl)phenyl]sulfonyl}piperazino)pyrimidine, N-[(4-Cyclohexyl-5-methylsulfanyl-1,2,4-triazol-3-yl)methyl]-4-methoxybenzamide, 6-Morpholin-4-yl-3-(2-pyrrolidin-1-ylethyl)-2-thioxo-2,3-dihydroquinazolin-4(1H)-one. 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 C18H24N4O2S?
C18H24N4O2S has a degree of unsaturation of 9. 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.