Molecular formula
C19H19N3O4
398 compounds have this formula on CompoundList.
- Molar mass
- 353.38g/mol
- Monoisotopic mass
- 353.1376Da
- Atoms
- 45
- Elements
- 4
- Rings plus double bonds
- 12
The formula C19H19N3O4 describes a molecule made of 19 carbon atoms, 19 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 × 1964.58%12.011 × 19 = 228.209 g/mol
- H Hydrogen × 195.42%1.008 × 19 = 19.152 g/mol
- N Nitrogen × 311.89%14.007 × 3 = 42.021 g/mol
- O Oxygen × 418.11%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C19H19N3O4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 301 to 398 of 398 compounds
3-(1-(4-(1H-Pyrrol-1-yl)benzoyl)piperidin-4-yl)oxazolidine-2,4-dione
CAS 2034274-48-9C19H19N3O4
N-(2-(4-Methoxy-6-methyl-2-oxopyridin-1(2H)-yl)ethyl)-5-phenylisoxazole-3-carboxamide
CAS 2034548-05-3C19H19N3O4
![1-(Benzo[d][1,3]dioxol-5-yl)-3-(2-hydroxy-2-(1-methyl-1H-indol-5-yl)ethyl)urea chemical structure, C19H19N3O4, CAS 2034256-61-4](/s/IZQAVKQOIOIQOT-UHFFFAOYSA-N.svg)
1-(Benzo[d][1,3]dioxol-5-yl)-3-(2-hydroxy-2-(1-methyl-1H-indol-5-yl)ethyl)urea
CAS 2034256-61-4C19H19N3O4
![1-[1-(Furan-3-carbonyl)piperidin-4-yl]-3-phenylimidazolidine-2,4-dione chemical structure, C19H19N3O4, CAS 2034604-27-6](/s/MVQZESIWOXLULL-UHFFFAOYSA-N.svg)
1-[1-(Furan-3-carbonyl)piperidin-4-yl]-3-phenylimidazolidine-2,4-dione
CAS 2034604-27-6C19H19N3O4
N-(3-(Isoxazol-4-yl)propyl)-4-methoxy-6-oxo-1-phenyl-1,6-dihydropyridine-3-carboxamide
CAS 1903333-30-1C19H19N3O4
3-(Methoxymethyl)-1-(4-((2-oxopyridin-1(2H)-YL)methyl)benzyl)-1H-pyrazole-4-carboxylic acid
CAS 1933495-77-2C19H19N3O4
Methyl 4-(((2-(2-oxopyrrolidin-1-yl)pyridin-4-yl)methyl)carbamoyl)benzoate
CAS 2034388-48-0C19H19N3O4
![Methyl 4-({[5-(2-oxopyrrolidin-1-yl)pyridin-3-yl]methyl}carbamoyl)benzoate chemical structure, C19H19N3O4, CAS 2034535-37-8](/s/UPBMTSKIABMIHK-UHFFFAOYSA-N.svg)
Methyl 4-({[5-(2-oxopyrrolidin-1-yl)pyridin-3-yl]methyl}carbamoyl)benzoate
CAS 2034535-37-8C19H19N3O4
![N-((2-(2-Oxopyrrolidin-1-yl)pyridin-4-yl)methyl)-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide chemical structure, C19H19N3O4, CAS 2034465-56-8](/s/SJIMOXZDMLQVBN-UHFFFAOYSA-N.svg)
N-((2-(2-Oxopyrrolidin-1-yl)pyridin-4-yl)methyl)-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide
CAS 2034465-56-8C19H19N3O4
![N-((2-(2-Oxopyrrolidin-1-yl)pyridin-4-yl)methyl)-2,3-dihydrobenzo[b][1,4]dioxine-5-carboxamide chemical structure, C19H19N3O4, CAS 2034422-40-5](/s/IWDPRBZNXMPZNF-UHFFFAOYSA-N.svg)
N-((2-(2-Oxopyrrolidin-1-yl)pyridin-4-yl)methyl)-2,3-dihydrobenzo[b][1,4]dioxine-5-carboxamide
CAS 2034422-40-5C19H19N3O4
![2-Hydroxy-N-[2-(4-methoxyphenyl)ethyl]-8-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxamide chemical structure, C19H19N3O4, CAS 886897-27-4](/s/COEUBPXCYUHLNE-UHFFFAOYSA-N.svg)
2-Hydroxy-N-[2-(4-methoxyphenyl)ethyl]-8-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxamide
CAS 886897-27-4C19H19N3O4
N'-(2-Hydroxy-5-methoxybenzylidene)-4-(2-oxopyrrolidin-1-yl)benzohydrazide
C19H19N3O4
![N-[5-(3,5-Dimethoxyphenyl)-1,3,4-oxadiazol-2-yl]-3-phenylpropanamide chemical structure, C19H19N3O4, CAS 941892-28-0](/s/PACPLQOGQFUWFJ-UHFFFAOYSA-N.svg)
N-[5-(3,5-Dimethoxyphenyl)-1,3,4-oxadiazol-2-yl]-3-phenylpropanamide
CAS 941892-28-0C19H19N3O4
![N-[5-(2,4-Dimethoxyphenyl)-1,3,4-oxadiazol-2-yl]-3-phenylpropanamide chemical structure, C19H19N3O4, CAS 941892-19-9](/s/DKCCZULEVSGQKP-UHFFFAOYSA-N.svg)
N-[5-(2,4-Dimethoxyphenyl)-1,3,4-oxadiazol-2-yl]-3-phenylpropanamide
CAS 941892-19-9C19H19N3O4
![N-(3,4-Dihydro-1H-[1,4]oxazino[4,3-a]benzimidazol-8-yl)-2-(4-methoxyphenoxy)acetamide chemical structure, C19H19N3O4, CAS 896080-08-3](/s/RCCCTSHDKFXNHM-UHFFFAOYSA-N.svg)
N-(3,4-Dihydro-1H-[1,4]oxazino[4,3-a]benzimidazol-8-yl)-2-(4-methoxyphenoxy)acetamide
CAS 896080-08-3C19H19N3O4
![N-[[3-(4-Methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]-2-methyl-N-prop-2-enylfuran-3-carboxamide chemical structure, C19H19N3O4, CAS 899541-08-3](/s/DWRSWCJWRCOZHG-UHFFFAOYSA-N.svg)
N-[[3-(4-Methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]-2-methyl-N-prop-2-enylfuran-3-carboxamide
CAS 899541-08-3C19H19N3O4
![2-(2-Methoxyphenoxy)-N-methyl-N-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]acetamide chemical structure, C19H19N3O4, CAS 887692-14-0](/s/URNIGPOXWYOZAH-UHFFFAOYSA-N.svg)
2-(2-Methoxyphenoxy)-N-methyl-N-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]acetamide
CAS 887692-14-0C19H19N3O4
![2,4-Dimethoxy-N-methyl-N-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]benzamide chemical structure, C19H19N3O4, CAS 878995-41-6](/s/XCHJTVZRIPDDOF-UHFFFAOYSA-N.svg)
2,4-Dimethoxy-N-methyl-N-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]benzamide
CAS 878995-41-6C19H19N3O4
N-(1-Acetyl-1,2,3,4-tetrahydroquinolin-7-yl)-2-methyl-3-nitrobenzamide
CAS 941950-10-3C19H19N3O4
N-(1-Acetyl-1,2,3,4-tetrahydroquinolin-7-yl)-3-methyl-4-nitrobenzamide
CAS 897620-49-4C19H19N3O4
![4-Methoxy-N-[[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]-N-methylbenzamide chemical structure, C19H19N3O4, CAS 915929-30-5](/s/KIAINGXZDCZISQ-UHFFFAOYSA-N.svg)
4-Methoxy-N-[[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]-N-methylbenzamide
CAS 915929-30-5C19H19N3O4
![[(Cyanomethyl)(phenyl)carbamoyl]methyl 4-acetyl-3,5-dimethyl-1H-pyrrole-2-carboxylate chemical structure, C19H19N3O4, CAS 874971-10-5](/s/JYYWTLZIQBIOPU-UHFFFAOYSA-N.svg)
[(Cyanomethyl)(phenyl)carbamoyl]methyl 4-acetyl-3,5-dimethyl-1H-pyrrole-2-carboxylate
CAS 874971-10-5C19H19N3O4
![2-[(2E)-2-Hydroxyimino-3-(4-methoxy-N-methylanilino)propyl]isoindole-1,3-dione chemical structure, C19H19N3O4, CAS 82585-46-4](/s/GWVHHVZAZPCQEU-DEDYPNTBSA-N.svg)
2-[(2E)-2-Hydroxyimino-3-(4-methoxy-N-methylanilino)propyl]isoindole-1,3-dione
CAS 82585-46-4C19H19N3O4
![Ethyl 4-[(6,7-dimethoxyquinazolin-4-yl)amino]benzoate chemical structure, C19H19N3O4, CAS 655248-76-3](/s/QHGGHLADHCRTMO-UHFFFAOYSA-N.svg)
Ethyl 4-[(6,7-dimethoxyquinazolin-4-yl)amino]benzoate
CAS 655248-76-3C19H19N3O4
- 4-Ethoxy-N-[4-(4-ethoxyphenyl)-1,2,5-oxadiazol-3-yl]benzamide874398-97-7C19H19N3O4
- N-[4-(4-Ethoxyphenyl)-1,2,5-oxadiazol-3-yl]-2-(4-methoxyphenyl)acetamide874399-00-5C19H19N3O4
- 4-Methoxy-N-{4-[4-(propan-2-yloxy)phenyl]-1,2,5-oxadiazol-3-yl}benzamide898492-80-3C19H19N3O4
- 2-Phenoxy-N-{4-[4-(propan-2-yloxy)phenyl]-1,2,5-oxadiazol-3-yl}acetamide898468-67-2C19H19N3O4
- 2-Methoxy-N-{4-[4-(propan-2-yloxy)phenyl]-1,2,5-oxadiazol-3-yl}benzamide898470-41-2C19H19N3O4
- 2-(3,4-Dimethoxyphenyl)-N-(2-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-3-yl)acetamide897616-60-3C19H19N3O4
- N-(2-Nitrobenzoyl)-N-phenylpiperidine-1-carboxamide899951-06-5C19H19N3O4
- N-[5-(2,5-Dimethoxyphenyl)-1,3,4-oxadiazol-2-yl]-3-phenylpropanamide952841-48-4C19H19N3O4
- 2-Ethoxy-N-{[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl}benzamide900765-43-7C19H19N3O4
- 2-(2-Methoxyphenoxy)-N-[2-(3-phenyl-1,2,4-oxadiazol-5-yl)ethyl]acetamide929829-88-9C19H19N3O4
- 2-Methyl-3-nitro-N-(5-oxo-1-(p-tolyl)pyrrolidin-3-yl)benzamide896366-23-7C19H19N3O4
- 4-Methyl-3-nitro-N-(5-oxo-1-(p-tolyl)pyrrolidin-3-yl)benzamide896366-29-3C19H19N3O4
- N-[1-(3,4-Dimethylphenyl)-5-oxopyrrolidin-3-yl]-3-nitrobenzamide896370-53-9C19H19N3O4
- N-{[3-(3,4-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl}-2-methylbenzamide915933-03-8C19H19N3O4
- 3-(4-Methoxyphenyl)-2-methyl-4-oxo-3,4-dihydroquinazolin-6-yl dimethylcarbamate1018148-96-3C19H19N3O4
- 3-(3-Methoxyphenyl)-2-methyl-4-oxo-3,4-dihydroquinazolin-6-yl dimethylcarbamate1040711-27-0C19H19N3O4
- 4-Oxo-3-[(pyridine-2-carbonyl)-amino]-piperidine-1-carboxylic acid benzyl ester1246891-67-7C19H19N3O4
- 3-(2,4-Dimethylphenyl)-2-methyl-8-nitro-2,3,5,6-tetrahydro-4H-2,6-methano-1,3,5-benzoxadiazocin-4-one1291855-16-7C19H19N3O4
- N-(3,5-Dimethoxyphenyl)-2-(4-methyl-1-oxophthalazin-2(1H)-yl)acetamide1246075-82-0C19H19N3O4
- N-[1-(1,3-Benzodioxol-5-ylcarbonyl)piperidin-4-yl]pyridine-2-carboxamide1282125-85-2C19H19N3O4
- 4-Benzyl-N-(2-carbamoylphenyl)-5-oxomorpholine-3-carboxamide1351584-59-2C19H19N3O4
- 3-{4-[(5-Methyl-furan-2-ylmethyl)-amino]-1-oxo-1,3-dihydro-isoindol-2-yl}-piperidine-2,6-dione927672-39-7C19H19N3O4
- N-(2-(Benzo[d][1,3]dioxol-5-yl)-2-hydroxypropyl)-2-methylimidazo[1,2-a]pyridine-3-carboxamide1421452-28-9C19H19N3O4
- N-{[5-(2-Oxopyrrolidin-1-yl)pyridin-3-yl]methyl}-2,3-dihydro-1,4-benzodioxine-2-carboxamide2097924-15-5C19H19N3O4
- Methyl (E)-4-oxo-4-[[(2S,3R)-2-(5-pyridin-3-yl-3-pyridinyl)oxolan-3-yl]amino]but-2-enoate2411181-06-9C19H19N3O4
- 2-(4-Methoxyphenoxy)-N-methyl-N-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]acetamide887691-73-8C19H19N3O4
- 1H-Indole-2-carboxamide, 3-[ethoxy(4-nitrophenyl)methyl]-1-methyl-61939-36-4C19H19N3O4
- Ethyl 1-(4-methoxybenzyl)-5-phenoxy-1H-1,2,3-triazole-4-carboxylate75020-43-8C19H19N3O4
- 2-(3,5-Dimethoxyphenyl)-4-(4-methoxyphenyl)-1H-imidazole-5-carboxamide1082440-33-2C19H19N3O4
- N-(2-Amino-4-methoxyphenyl)-1,3-dihydro-1,3-dioxo-2H-isoindole-2-butanamide1082176-32-6C19H19N3O4
- [1-(5-Acetyl-furan-2-ylmethyl)-1H-pyrazol-3-yl]-carbamic acid 3-methyl-benzyl ester1163255-53-5C19H19N3O4
- [1-(5-Acetyl-furan-2-ylmethyl)-1H-pyrazol-4-yl]-carbamic acid 2-methyl-benzyl ester1163255-87-5C19H19N3O4
- [1-(5-Acetyl-furan-2-ylmethyl)-1H-pyrazol-4-yl]-carbamic acid 3-methyl-benzyl ester1163256-12-9C19H19N3O4
- [1-(5-Acetyl-furan-2-ylmethyl)-1H-pyrazol-3-yl]-carbamic acid 2-methyl-benzyl ester1163255-29-5C19H19N3O4
- 2-Hydroxy-1-(3-(6-(tetrahydro-2H-pyran-4-yloxy)imidazo[1,2-b]pyridazin-3-yl)phenyl)ethanone1012344-96-5C19H19N3O4
- N-[4,5-Dihydro-1-(3-methoxyphenyl)-3-methyl-5-oxo-1H-pyrazol-4-yl]carbamic acid phenylmethyl ester1805820-13-6C19H19N3O4
- Ethyl 1-(6-(2-hydroxy-3-methylphenyl)pyridin-2-yl)-5-methoxy-1H-pyrazole-4-carboxylate1579516-87-2C19H19N3O4
- 4-(6-Aminohex-1-ynyl)-2-(2,6-dioxo-3-piperidyl)isoindoline-1,3-dione2603381-77-5C19H19N3O4
- 1 suppliersN-[2-(2,6-Dioxo-3-piperidyl)-1-oxo-isoindolin-4-yl]hex-5-ynamide2408797-65-7C19H19N3O4
- 3-{2-[2-(Dimethylamino)ethyl]phenyl}-2,4-dioxo-1,2,3,4-tetrahydroquinazoline-7-carboxylic acid2763750-12-3C19H19N3O4
- Ethyl 1-benzyl-5-(4-methoxyphenoxy)-1H-1,2,3-triazole-4-carboxylate75020-24-5C19H19N3O4
- Ethyl 1-benzyl-5-(3-methoxyphenoxy)-1H-1,2,3-triazole-4-carboxylate79572-26-2C19H19N3O4
- 4-(4-Aminophenoxy)-7-(2-methoxyethoxy)quinoline-6-carboxamide417722-85-1C19H19N3O4
- 1-(Furan-2-carbonyl)-4-[3-(3-methoxyphenyl)-1,2,4-oxadiazol-5-yl]piperidine1046026-63-4C19H19N3O4
- N-[2-(1,4-Dioxo-3,4-dihydrophthalazin-2(1H)-yl)ethyl]-3-phenoxypropanamide1783244-53-0C19H19N3O4
- Ethyl 1-[6-(2-hydroxy-5-methylphenyl)-2-pyridinyl]-5-methoxypyrazole-4-carboxylate1579517-00-2C19H19N3O4
- Ethyl 1-[6-(2-hydroxy-4-methylphenyl)-2-pyridinyl]-5-methoxypyrazole-4-carboxylate1579516-98-5C19H19N3O4
- Ethyl 5-ethoxy-1-[6-(2-hydroxyphenyl)-2-pyridinyl]pyrazole-4-carboxylate1579517-21-7C19H19N3O4
- N-(3-Carbamoylphenyl)-1-(4-methoxyphenyl)-5-oxopyrrolidine-3-carboxamide2380186-00-3C19H19N3O4
- 7'-(Benzyloxy)-12',12a'-dihydro-1'H,4'H-spiro[cyclopropane-1,3'-[1,4]oxazino[3,4-c]pyrido[2,1-f][1,2,4]triazine]-6',8'-dione2364588-66-7C19H19N3O4
- Methyl 3-cyclopropyl-4-hydroxy-1-(4-methoxybenzyl)-1H-pyrazolo[3,4-B]pyridine-6-carboxylate2708277-95-4C19H19N3O4
- 2-{[(Benzyloxy)carbonyl]amino}-3-(2-methyl-1H-1,3-benzodiazol-1-yl)propanoic acid2137485-03-9C19H19N3O4
- 2-{[(Benzyloxy)carbonyl]amino}-3-(1H-indazol-1-yl)butanoic acid2137477-20-2C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 6-[ethyl(propan-2-yl)amino]pyridine-3-carboxylate2248370-03-6C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-cyclopentyl-5-ethyl-1H-pyrazole-4-carboxylate2248307-27-7C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 6-[ethyl(propyl)amino]pyridine-3-carboxylate2248323-87-5C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-cyclohexyl-1-methyl-1H-pyrazole-4-carboxylate2248293-44-7C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 5-cyclopropyl-1-(2-methylpropyl)-1H-pyrazole-4-carboxylate2248317-95-3C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-cyclohexyl-5-methyl-1H-pyrazole-3-carboxylate2248279-25-4C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-(propan-2-yl)-4,5,6,7-tetrahydro-1H-1,3-benzodiazole-5-carboxylate2248403-29-2C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-(butan-2-yl)-5-cyclopropyl-1H-pyrazole-4-carboxylate2248306-35-4C19H19N3O4
- 2-{[(Benzyloxy)carbonyl]amino}-3-(1H-indazol-1-yl)-2-methylpropanoic acid2138525-57-0C19H19N3O4
- 3-(1H-1,3-Benzodiazol-1-yl)-2-{[(benzyloxy)carbonyl]amino}butanoic acid2137476-88-9C19H19N3O4
- 3-(1H-1,3-Benzodiazol-1-yl)-2-{[(benzyloxy)carbonyl]amino}-2-methylpropanoic acid2138569-31-8C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-cyclohexyl-5-methyl-1H-pyrazole-4-carboxylate2248303-77-5C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-[1-(cyclopropylmethyl)-3,5-dimethyl-1H-pyrazol-4-yl]acetate2248289-76-9C19H19N3O4
- tert-Butyl N-[3-(3-hydroxyphenyl)-4-oxo-3,4-dihydroquinazolin-6-yl]carbamate2639458-47-0C19H19N3O4
- 4-(1H-1,3-Benzodiazol-1-yl)-2-{[(benzyloxy)carbonyl]amino}butanoic acid2680549-24-8C19H19N3O4
- 3-({[(tert-Butoxy)carbonyl](3-cyanopyridin-2-yl)amino}methyl)benzoic acid2680893-53-0C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-(propan-2-yl)-5H,6H,7H,8H-imidazo[1,2-a]pyridine-2-carboxylate2248277-98-5C19H19N3O4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-tert-butyl-5-cyclopropyl-1H-pyrazole-3-carboxylate2248401-29-6C19H19N3O4
- 2-[2-(2-{[(Benzyloxy)carbonyl]amino}ethyl)-1H-1,3-benzodiazol-1-yl]acetic acid2764017-24-3C19H19N3O4
- 1 suppliersLenalidomide-5'-CO-C3-alkyne2940934-48-3C19H19N3O4
- 1 suppliersPomalidomide-5'-C4-alkyne2940936-88-7C19H19N3O4
Frequently asked questions
What is the molar mass of C19H19N3O4?
The molar mass of C19H19N3O4 is 353.38 g/mol, calculated from standard atomic weights for 19 carbon atoms, 19 hydrogen atoms, 3 nitrogen atoms and 4 oxygen atoms. The monoisotopic mass is 353.1376 Da.
How many compounds have the formula C19H19N3O4?
CompoundList lists 398 compounds with the molecular formula C19H19N3O4, including 3-(1-(4-(1H-Pyrrol-1-yl)benzoyl)piperidin-4-yl)oxazolidine-2,4-dione, N-(2-(4-Methoxy-6-methyl-2-oxopyridin-1(2H)-yl)ethyl)-5-phenylisoxazole-3-carboxamide, 1-(Benzo[d][1,3]dioxol-5-yl)-3-(2-hydroxy-2-(1-methyl-1H-indol-5-yl)ethyl)urea. 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 C19H19N3O4?
C19H19N3O4 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.