Molecular formula
C18H18N4O2S
315 compounds have this formula on CompoundList.
- Molar mass
- 354.43g/mol
- Monoisotopic mass
- 354.1150Da
- Atoms
- 43
- Elements
- 5
- Rings plus double bonds
- 12
The formula C18H18N4O2S describes a molecule made of 18 carbon atoms, 18 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 × 1861.00%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 185.12%1.008 × 18 = 18.144 g/mol
- N Nitrogen × 415.81%14.007 × 4 = 56.028 g/mol
- O Oxygen × 29.03%15.999 × 2 = 31.998 g/mol
- S Sulfur × 19.05%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C18H18N4O2S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 315 compounds
![(4Z)-2-Methoxy-4-[[2-(5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-yl)hydrazinyl]methylidene]cyclohexa-2,5-dien-1-one chemical structure, C18H18N4O2S, CAS 304684-77-3](/s/VFNUTEMVQGLDAG-ZVBGSRNCSA-N.svg)
(4Z)-2-Methoxy-4-[[2-(5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-yl)hydrazinyl]methylidene]cyclohexa-2,5-dien-1-one
CAS 304684-77-3C18H18N4O2S
![6-(2-Oxo-2-(pyrrolidin-1-yl)ethyl)-2,3-dihydrothiazolo[3',2':1,2]pyrimido[5,4-b]indol-5(6H)-one chemical structure, C18H18N4O2S, CAS 898918-58-6](/s/KCFDEHUJFJKLQS-UHFFFAOYSA-N.svg)
6-(2-Oxo-2-(pyrrolidin-1-yl)ethyl)-2,3-dihydrothiazolo[3',2':1,2]pyrimido[5,4-b]indol-5(6H)-one
CAS 898918-58-6C18H18N4O2S
3-(4-Oxoquinazolin-3-yl)-N-(4,5,6,7-tetrahydro-1,3-benzothiazol-2-yl)propanamide
CAS 701223-09-8C18H18N4O2S
N-(1,5-Dimethyl-3-oxo-2-phenylpyrazol-4-yl)-2-pyridin-2-ylsulfanylacetamide
CAS 332862-15-4C18H18N4O2S
![N-Benzyl-2-((4-hydroxy-5,7-dimethylpyrido[2,3-d]pyrimidin-2-yl)thio)acetamide chemical structure, C18H18N4O2S, CAS 632289-20-4](/s/LWFCKAMYHRHYHA-UHFFFAOYSA-N.svg)
N-Benzyl-2-((4-hydroxy-5,7-dimethylpyrido[2,3-d]pyrimidin-2-yl)thio)acetamide
CAS 632289-20-4C18H18N4O2S
![2-(4-Hydroxy-5,7-dimethyl-pyrido[2,3-d]pyrimidin-2-ylsulfanyl)-N-p-tolyl-acetamide chemical structure, C18H18N4O2S, CAS 799256-05-6](/s/AVFRLOCJOLGAOJ-UHFFFAOYSA-N.svg)
2-(4-Hydroxy-5,7-dimethyl-pyrido[2,3-d]pyrimidin-2-ylsulfanyl)-N-p-tolyl-acetamide
CAS 799256-05-6C18H18N4O2S
![Isopropyl {[4-phenyl-5-(2-pyridinyl)-4H-1,2,4-triazol-3-yl]thio}acetate chemical structure, C18H18N4O2S, CAS 712282-66-1](/s/COXLIICVRIOROE-UHFFFAOYSA-N.svg)
Isopropyl {[4-phenyl-5-(2-pyridinyl)-4H-1,2,4-triazol-3-yl]thio}acetate
CAS 712282-66-1C18H18N4O2S
![3-[2-(4-Methoxyphenyl)-4-oxoquinazolin-3-yl]-1,1-dimethylthiourea chemical structure, C18H18N4O2S, CAS 522660-13-5](/s/BEOFUFFOBJWCLT-UHFFFAOYSA-N.svg)
3-[2-(4-Methoxyphenyl)-4-oxoquinazolin-3-yl]-1,1-dimethylthiourea
CAS 522660-13-5C18H18N4O2S
![2-[2-(2,5-Dimethyl-1H-pyrrol-1-yl)-3-thienyl]-5-(methoxymethyl)pyrazolo[1,5-a]pyrimidin-7-ol chemical structure, C18H18N4O2S, CAS 478258-99-0](/s/OXXNFFSANNJCFO-UHFFFAOYSA-N.svg)
2-[2-(2,5-Dimethyl-1H-pyrrol-1-yl)-3-thienyl]-5-(methoxymethyl)pyrazolo[1,5-a]pyrimidin-7-ol
CAS 478258-99-0C18H18N4O2S
![2-({4-Hydroxy-5,7-dimethylpyrido[2,3-D]pyrimidin-2-YL}sulfanyl)-N-(3-methylphenyl)acetamide chemical structure, C18H18N4O2S, CAS 694468-25-2](/s/FXZDIQPXWMLQOU-UHFFFAOYSA-N.svg)
2-({4-Hydroxy-5,7-dimethylpyrido[2,3-D]pyrimidin-2-YL}sulfanyl)-N-(3-methylphenyl)acetamide
CAS 694468-25-2C18H18N4O2S
![2-[4-(4-Nitrobenzyl)piperazino]-1,3-benzothiazole chemical structure, C18H18N4O2S, CAS 478076-98-1](/s/JZRMQNWNCVZXKE-UHFFFAOYSA-N.svg)
2-[4-(4-Nitrobenzyl)piperazino]-1,3-benzothiazole
CAS 478076-98-1C18H18N4O2S
![N-[(2-Oxo-1,3-dihydrobenzimidazol-5-yl)carbamothioyl]-4-propan-2-ylbenzamide chemical structure, C18H18N4O2S, CAS 590394-72-2](/s/PVWKZXWWENBMOE-UHFFFAOYSA-N.svg)
N-[(2-Oxo-1,3-dihydrobenzimidazol-5-yl)carbamothioyl]-4-propan-2-ylbenzamide
CAS 590394-72-2C18H18N4O2S
![2,4,6-Trimethyl-N-[2-(3-pyridinyl)-4-pyrimidinyl]benzenesulfonamide chemical structure, C18H18N4O2S, CAS 439108-35-7](/s/MXINLYCPNMLGET-UHFFFAOYSA-N.svg)
2,4,6-Trimethyl-N-[2-(3-pyridinyl)-4-pyrimidinyl]benzenesulfonamide
CAS 439108-35-7C18H18N4O2S
![N-[[2-Methyl-5-([1,3]oxazolo[4,5-b]pyridin-2-yl)phenyl]carbamothioyl]butanamide chemical structure, C18H18N4O2S, CAS 364615-59-8](/s/GYIHBXUUZRAEMG-UHFFFAOYSA-N.svg)
N-[[2-Methyl-5-([1,3]oxazolo[4,5-b]pyridin-2-yl)phenyl]carbamothioyl]butanamide
CAS 364615-59-8C18H18N4O2S
2-Ethoxy-4-(((3-mercapto-5-(3-ME-phenyl)-4H-1,2,4-triazol-4-yl)imino)ME)phenol
CAS 478256-09-6C18H18N4O2S
N-(3-(Allylamino)quinoxalin-2-yl)-3-methylbenzenesulfonamide
CAS 713128-21-3C18H18N4O2S
![2-Methyl-N-[[2-methyl-4-([1,3]oxazolo[4,5-b]pyridin-2-yl)phenyl]carbamothioyl]propanamide chemical structure, C18H18N4O2S, CAS 689740-58-7](/s/AJPYVHBBETUGBY-UHFFFAOYSA-N.svg)
2-Methyl-N-[[2-methyl-4-([1,3]oxazolo[4,5-b]pyridin-2-yl)phenyl]carbamothioyl]propanamide
CAS 689740-58-7C18H18N4O2S
5-(3-Ethoxyphenyl)-4-((3-methoxybenzylidene)amino)-4H-1,2,4-triazole-3-thiol
CAS 613249-81-3C18H18N4O2S
![4-{[(E)-(2,5-Dimethoxyphenyl)methylidene]amino}-5-(3-methylphenyl)-4H-1,2,4-triazole-3-thiol chemical structure, C18H18N4O2S, CAS 478255-68-4](/s/PJAQJKFQDAIHKP-YBFXNURJSA-N.svg)
4-{[(E)-(2,5-Dimethoxyphenyl)methylidene]amino}-5-(3-methylphenyl)-4H-1,2,4-triazole-3-thiol
CAS 478255-68-4C18H18N4O2S
4-(((E)-(3,4-Dimethoxyphenyl)methylidene)amino)-5-(3-methylphenyl)-4H-1,2,4-triazole-3-thiol
CAS 478256-14-3C18H18N4O2S
4-(((E)-(2,4-Dimethoxyphenyl)methylidene)amino)-5-(3-methylphenyl)-4H-1,2,4-triazole-3-thiol
CAS 478255-91-3C18H18N4O2S
5-(3-Ethoxyphenyl)-4-((4-methoxybenzylidene)amino)-4H-1,2,4-triazole-3-thiol
CAS 497921-80-9C18H18N4O2S
4-(((E)-(2,3-Dimethoxyphenyl)methylidene)amino)-5-(3-methylphenyl)-4H-1,2,4-triazole-3-thiol
CAS 478255-67-3C18H18N4O2S
2-Ethoxy-6-(((3-mercapto-5-(3-methyl-PH)-4H-1,2,4-triazol-4-yl)imino)ME)phenol
CAS 478255-52-6C18H18N4O2S
- 4-[(E)-(2-Ethoxyphenyl)methylideneamino]-3-(phenoxymethyl)-1H-1,2,4-triazole-5-thione497864-95-6C18H18N4O2S
- N'-(1-(4-Methoxyphenyl)ethylidene)3(5-ME-2-thienyl)-1H-pyrazole-5-carbohydrazide303106-47-0C18H18N4O2S
- 3-(((3-(3-Isopropoxyphenyl)-5-mercapto-4H-1,2,4-triazol-4-yl)imino)methyl)phenol577983-64-3C18H18N4O2S
- 4-((4-Ethoxybenzylidene)amino)-5-(3-methoxyphenyl)-4H-1,2,4-triazole-3-thiol497920-48-6C18H18N4O2S
- 4-((4-Ethoxybenzylidene)amino)-5-(2-methoxyphenyl)-4H-1,2,4-triazole-3-thiol478256-63-2C18H18N4O2S
- 5-(3-Ethoxyphenyl)-4-((2-methoxybenzylidene)amino)-4H-1,2,4-triazole-3-thiol497921-93-4C18H18N4O2S
- 2-(((3-(3-Isopropoxyphenyl)-5-mercapto-4H-1,2,4-triazol-4-yl)imino)methyl)phenol587012-58-6C18H18N4O2S
- N-(4-Methoxybenzylidene)-3-[(4-methoxybenzyl)thio]-4H-1,2,4-triazol-4-amine620100-57-4C18H18N4O2S
- 6-Morpholin-4-yl-3-(pyridin-2-ylmethyl)-2-sulfanylidene-1H-quinazolin-4-one689766-27-6C18H18N4O2S
- 2-((4-Allyl-5-(2-furyl)-4H-1,2,4-triazol-3-yl)thio)-N-(3-methylphenyl)acetamide573931-16-5C18H18N4O2S
- 5-Benzylsulfanyl-7-cyclopropyl-1,3-dimethylpyrimido[4,5-d]pyrimidine-2,4-dione863003-19-4C18H18N4O2S
- 2-Methyl-6-(4-phenylpiperazine-1-carbonyl)-5H-thiazolo[3,2-a]pyrimidin-5-one896336-26-8C18H18N4O2S
- N-(2,4-Dimethylphenyl)-2-(7-methyl-4-oxopyrido[1,2-a][1,3,5]triazin-2-yl)sulfanylacetamide896318-77-7C18H18N4O2S
- N-(3,5-Dimethylphenyl)-2-(7-methyl-4-oxopyrido[1,2-a][1,3,5]triazin-2-yl)sulfanylacetamide896318-85-7C18H18N4O2S
- 2-((7-Methyl-4-oxo-4H-pyrido[1,2-a][1,3,5]triazin-2-yl)thio)-N-phenethylacetamide896321-65-6C18H18N4O2S
- 2-((9-Methyl-4-oxo-4H-pyrido[1,2-a][1,3,5]triazin-2-yl)thio)-N-phenethylacetamide896342-47-5C18H18N4O2S
- 2-Amino-N-(4-morpholin-4-ylphenyl)-1,3-benzothiazole-6-carboxamide924398-71-0C18H18N4O2S
- 3-(2-Ethoxyphenyl)-N'-(1-(2-thienyl)ethylidene)-1H-pyrazole-5-carbohydrazide303104-09-8C18H18N4O2S
- 2-(4-Methoxyphenyl)-N-((4-phenyl-5-thioxo-4,5-dihydro-1H-1,2,4-triazol-3-yl)methyl)acetamide391888-20-3C18H18N4O2S
- 3-(3-Ethoxyphenyl)-N'-(1-(2-thienyl)ethylidene)-1H-pyrazole-5-carbohydrazide303107-66-6C18H18N4O2S
- 2-Methoxy-5-[(2-{8-thia-4,6-diazatricyclo[7.4.0.0,2,7]trideca-1(9),2,4,6-tetraen-3-yl}hydrazin-1-ylidene)methyl]phenol328034-08-8C18H18N4O2S
- 2-(9-Methyl-4-oxopyrido[1,2-a][1,3,5]triazin-2-yl)sulfanyl-N-[(4-methylphenyl)methyl]acetamide896343-59-2C18H18N4O2S
- 2-((4-(4-Methoxyphenyl)-5-methyl-4H-1,2,4-triazol-3-yl)thio)-N-phenylacetamide618439-54-6C18H18N4O2S
- N'-(4-Propoxybenzylidene)-3-(2-thienyl)-1H-pyrazole-5-carbohydrazide303103-98-2C18H18N4O2S
- 4-(((3-(3-Isopropoxyphenyl)-5-mercapto-4H-1,2,4-triazol-4-yl)imino)methyl)phenol677780-15-3C18H18N4O2S
- 2-(8-Methyl-4-oxopyrido[1,2-a][1,3,5]triazin-2-yl)sulfanyl-N-[(4-methylphenyl)methyl]acetamide896332-85-7C18H18N4O2S
- WR 18087260368-04-9C18H18N4O2S
- 4-Ethyl-3-(4-methylphenyl)-5-[(4-nitrophenyl)methylsulfanyl]-1,2,4-triazole488706-89-4C18H18N4O2S
- N-(4-Ethylphenyl)-2-(7-methyl-4-oxopyrido[1,2-a][1,3,5]triazin-2-yl)sulfanylacetamide896319-01-0C18H18N4O2S
- 2-((8-Methyl-4-oxo-4H-pyrido[1,2-a][1,3,5]triazin-2-yl)thio)-N-phenethylacetamide896331-94-5C18H18N4O2S
- 2-(3-Amino-4-oxoquinazolin-2-yl)sulfanyl-N-(1-phenylethyl)acetamide540515-38-6C18H18N4O2S
- 2-(2-Nitro-5-piperidin-1-ylphenyl)sulfanyl-1H-benzimidazole330997-66-5C18H18N4O2S
- 7-Amino-2-benzylsulfanyl-4-oxo-5-propan-2-yl-3,5-dihydropyrano[2,3-d]pyrimidine-6-carbonitrile536719-76-3C18H18N4O2S
- N-(1,3-Benzothiazol-2-yl)-2-(3-oxo-3,5,6,7,8,9-hexahydro-2H-cyclohepta[c]pyridazin-2-yl)acetamide1324078-79-6C18H18N4O2S
- 2-(4-(1H-Pyrrol-1-yl)benzamido)-N,N,4-trimethylthiazole-5-carboxamide1206994-75-3C18H18N4O2S
- 1-Phenyl-3-{5-[4-(propan-2-ylsulfanyl)phenyl]-1,3,4-oxadiazol-2-yl}urea1207003-33-5C18H18N4O2S
- 2-(4-Methyl-2-phenylthiazol-5-yl)-N-(2-(6-oxopyridazin-1(6H)-yl)ethyl)acetamide1219901-71-9C18H18N4O2S
- 2-Methyl-3-(6-oxo-3-(thiophen-2-yl)pyridazin-1(6H)-yl)-N-(pyridin-2-ylmethyl)propanamide1286732-16-8C18H18N4O2S
- 1-[(1r)-1-(3-Methoxyphenyl)ethyl]-3-(4-Pyridin-4-Yl-1,3-Thiazol-2-Yl)urea1342277-77-3C18H18N4O2S
- N-(2,3-Dimethylphenyl)-2-((3-(2-hydroxyphenyl)-1H-1,2,4-triazol-5-yl)thio)acetamide332126-80-4C18H18N4O2S
- (Phenylsulfonyl)(3-pyrrolidinylquinoxalin-2-yl)amine731004-39-0C18H18N4O2S
- 2-((6-(3,5-Dimethyl-1H-pyrazol-1-yl)pyridazin-3-yl)thio)-1-(3-methoxyphenyl)ethanone1334374-61-6C18H18N4O2S
- 1-Ethyl-5-(4-methyl-5-((2-oxo-2-phenylethyl)thio)-4H-1,2,4-triazol-3-yl)pyridin-2(1H)-one1105209-65-1C18H18N4O2S
- 1-Benzyl-3-(2-{[6-(thiophen-2-yl)pyridazin-3-yl]oxy}ethyl)urea1021250-62-3C18H18N4O2S
- 1-(2-((6-(Thiophen-2-yl)pyridazin-3-yl)oxy)ethyl)-3-(m-tolyl)urea1021082-07-4C18H18N4O2S
- N-(5-Acetyl-4-phenylthiazol-2-yl)-1-ethyl-3-methyl-1H-pyrazole-5-carboxamide1170387-05-9C18H18N4O2S
- 2-((2-Methoxy-5-methylphenyl)amino)-N-(pyridin-2-ylmethyl)thiazole-4-carboxamide1170609-04-7C18H18N4O2S
- 2-((6-(2,5-Dimethylphenyl)pyridazin-3-yl)thio)-N-(5-methylisoxazol-3-yl)acetamide923083-70-9C18H18N4O2S
- 4-(6-Oxo-3-(p-tolyl)pyridazin-1(6H)-yl)-N-(thiazol-2-yl)butanamide946322-32-3C18H18N4O2S
- (Z)-N-(1-(4-(3-Methoxyphenyl)thiazol-2-yl)-3-methyl-1H-pyrazol-5-yl)but-2-enamide1019104-83-6C18H18N4O2S
- 4-[6-Oxo-3-(thiophen-2-yl)-1,6-dihydropyridazin-1-yl]-N-[(pyridin-2-yl)methyl]butanamide1040638-71-8C18H18N4O2S
- N-(6-{[2-(2,3-Dihydro-1H-indol-1-yl)-2-oxoethyl]sulfanyl}pyridazin-3-yl)cyclopropanecarboxamide1021228-29-4C18H18N4O2S
- 2-[(E)-C-Methyl-N-(5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-ylamino)carbonimidoyl]benzene-1,4-diol301655-16-3C18H18N4O2S
- N-(3-Carbamoyl-5-phenylthiophen-2-yl)-1-ethyl-3-methyl-1H-pyrazole-5-carboxamide1170438-20-6C18H18N4O2S
- 2-{5-[(2-Methylphenoxy)methyl]-4-phenyl-1,2,4-triazol-3-ylthio}acetamide482646-13-9C18H18N4O2S
- 1 suppliersMethyl 2-((5-amino-4-(4-cyclopropylnaphthalen-1-yl)-4H-1,2,4-triazol-3-yl)thio)acetate878671-98-8C18H18N4O2S
- 2-((2-Methoxy-5-methylphenyl)amino)-N-(pyridin-4-ylmethyl)thiazole-4-carboxamide1170139-70-4C18H18N4O2S
- 2-[4-(Naphthalene-2-sulfonyl)piperazin-1-yl]pyrimidine256417-34-2C18H18N4O2S
- 1-(4-Methoxyphenyl)-3-[5-(2-phenylethyl)-1,3,4-thiadiazol-2-yl]urea309736-00-3C18H18N4O2S
- 2-[(3-Amino-3,4-dihydro-4-oxo-2-quinazolinyl)thio]-N-(2-phenylethyl)acetamide540515-53-5C18H18N4O2S
- N-Benzyl-2-[[5-(furan-2-yl)-4-prop-2-enyl-1,2,4-triazol-3-yl]sulfanyl]acetamide442672-10-8C18H18N4O2S
- (3-Benzylsulfanyl-[1,2,4]triazol-4-yl)-(3,4-dimethoxy-benzylidene)-amine5807-83-0C18H18N4O2S
- 1-(2-Methoxyphenyl)-5-methyl-N-(2-methylsulfanylphenyl)triazole-4-carboxamide871323-17-0C18H18N4O2S
- 1-(4-Methoxyphenyl)-5-methyl-N-[2-(methylsulfanyl)phenyl]-1H-1,2,3-triazole-4-carboxamide878735-46-7C18H18N4O2S
- 1-[5-(4-Methoxybenzyl)-1,3,4-thiadiazol-2-yl]-3-(4-methylphenyl)urea426240-13-3C18H18N4O2S
- 1-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)-3-(3-hydroxyphenyl)thiourea402945-04-4C18H18N4O2S
- N-(2,6-Dimethylphenyl)-2-{[3-(1H-pyrrol-1-yl)-2-thienyl]carbonyl}-1-hydrazinecarboxamide478062-89-4C18H18N4O2S
- 9-(4-Hydroxyphenyl)-2-(prop-2-en-1-ylsulfanyl)-5,6,7,9-tetrahydro[1,2,4]triazolo[5,1-b]quinazolin-8(4H)-one727402-86-0C18H18N4O2S
- (E)-4-((3-Methoxy-4-phenethoxybenzylidene)amino)-4H-1,2,4-triazole-3-thiol686284-60-6C18H18N4O2S
- (E)-2-(Benzo[d]oxazol-2-ylthio)-N'-(4-(dimethylamino)benzylidene)acetohydrazide113546-72-8C18H18N4O2S
- (E)-N'-(2-Ethoxybenzylidene)-3-(5-methylthiophen-2-yl)-1H-pyrazole-5-carbohydrazide402483-07-2C18H18N4O2S
- (E)-3-(4-Isopropoxyphenyl)-N'-(thiophen-2-ylmethylene)-1H-pyrazole-5-carbohydrazide634894-77-2C18H18N4O2S
- 1-(4-Methoxyphenyl)-N-{[4-(methylsulfanyl)phenyl]methyl}-1H-1,2,3-triazole-4-carboxamide1226455-31-7C18H18N4O2S
- 1-(4-(Pyrazolo[1,5-a]pyridine-3-carbonyl)piperazin-1-yl)-2-(thiophen-2-yl)ethanone1421584-05-5C18H18N4O2S
- N-(3,4-Dimethylphenyl)-2-((3-(2-hydroxyphenyl)-1H-1,2,4-triazol-5-yl)thio)acetamide332126-74-6C18H18N4O2S
- 1-(3,4-Dimethylphenyl)-3-[5-(4-methoxyphenyl)-1,3,4-thiadiazol-2-yl]urea429628-04-6C18H18N4O2S
Frequently asked questions
What is the molar mass of C18H18N4O2S?
The molar mass of C18H18N4O2S is 354.43 g/mol, calculated from standard atomic weights for 18 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms, 2 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 354.1150 Da.
How many compounds have the formula C18H18N4O2S?
CompoundList lists 315 compounds with the molecular formula C18H18N4O2S, including (4Z)-2-Methoxy-4-[[2-(5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-yl)hydrazinyl]methylidene]cyclohexa-2,5-dien-1-one, 6-(2-Oxo-2-(pyrrolidin-1-yl)ethyl)-2,3-dihydrothiazolo[3',2':1,2]pyrimido[5,4-b]indol-5(6H)-one, 3-(4-Oxoquinazolin-3-yl)-N-(4,5,6,7-tetrahydro-1,3-benzothiazol-2-yl)propanamide. 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 C18H18N4O2S?
C18H18N4O2S 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.