Molecular formula
C18H17N3O3S2
125 compounds have this formula on CompoundList.
- Molar mass
- 387.47g/mol
- Monoisotopic mass
- 387.0711Da
- Atoms
- 43
- Elements
- 5
- Rings plus double bonds
- 12
The formula C18H17N3O3S2 describes a molecule made of 18 carbon atoms, 17 hydrogen atoms, 3 nitrogen atoms, 3 oxygen atoms and 2 sulfur 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 × 1855.80%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 174.42%1.008 × 17 = 17.136 g/mol
- N Nitrogen × 310.84%14.007 × 3 = 42.021 g/mol
- O Oxygen × 312.39%15.999 × 3 = 47.997 g/mol
- S Sulfur × 216.55%32.06 × 2 = 64.120 g/mol
Look up another formula
Compounds with the formula C18H17N3O3S2
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 125 compounds
![6-[(3-Methoxyphenyl)methyl]-4-methyl-2-methylsulfinyl-5-thieno[3,4]pyrrolo[1,3-d]pyridazinone chemical structure, C18H17N3O3S2, CAS 1221186-52-2](/s/MORBXZMIXGYQDB-UHFFFAOYSA-N.svg)
6-[(3-Methoxyphenyl)methyl]-4-methyl-2-methylsulfinyl-5-thieno[3,4]pyrrolo[1,3-d]pyridazinone
CAS 1221186-52-2C18H17N3O3S2
![3-Phenyl-N-{4-[(1,3-thiazol-2-ylamino)sulfonyl]phenyl}propanamide chemical structure, C18H17N3O3S2, CAS 314767-66-3](/s/GSQLMPWOXGTXKP-UHFFFAOYSA-N.svg)
3-Phenyl-N-{4-[(1,3-thiazol-2-ylamino)sulfonyl]phenyl}propanamide
CAS 314767-66-3C18H17N3O3S2
![3-[3-(Pyrrolidine-1-sulfonyl)phenyl]-2-sulfanyl-3,4-dihydroquinazolin-4-one chemical structure, C18H17N3O3S2, CAS 730976-45-1](/s/GIHSZHCNERHCKY-UHFFFAOYSA-N.svg)
3-[3-(Pyrrolidine-1-sulfonyl)phenyl]-2-sulfanyl-3,4-dihydroquinazolin-4-one
CAS 730976-45-1C18H17N3O3S2
![Ethyl 2-[2-(2-benzamidoethyl)-1,3-thiazol-4-yl]-1,3-thiazole-4-carboxylate chemical structure, C18H17N3O3S2, CAS 30760-79-3](/s/CYSBXYHRQLJFCV-UHFFFAOYSA-N.svg)
Ethyl 2-[2-(2-benzamidoethyl)-1,3-thiazol-4-yl]-1,3-thiazole-4-carboxylate
CAS 30760-79-3C18H17N3O3S2
![4-[3-(2-Pyridin-3-yl-thiazol-4-yl)-benzenesulfonyl]-morpholine chemical structure, C18H17N3O3S2, CAS 840485-82-7](/s/VAHRBQQAKZMNNQ-UHFFFAOYSA-N.svg)
4-[3-(2-Pyridin-3-yl-thiazol-4-yl)-benzenesulfonyl]-morpholine
CAS 840485-82-7C18H17N3O3S2
3-(4-Methylphenyl)sulfonyl-N-(4-pyridin-4-yl-1,3-thiazol-2-yl)propanamide
CAS 895446-81-8C18H17N3O3S2
N-(2,4-Dimethoxyphenyl)-2-(6-thiophen-2-ylpyridazin-3-yl)sulfanylacetamide
CAS 872723-59-6C18H17N3O3S2
![4-Methyl-2-[(4-methylphenyl)sulfonylamino]-N-phenyl-1,3-thiazole-5-carboxamide chemical structure, C18H17N3O3S2, CAS 380590-91-0](/s/PFAJWVQJQKFRMD-UHFFFAOYSA-N.svg)
4-Methyl-2-[(4-methylphenyl)sulfonylamino]-N-phenyl-1,3-thiazole-5-carboxamide
CAS 380590-91-0C18H17N3O3S2
![4-[4-(2-Pyridin-3-yl-1,3-thiazol-4-yl)phenyl]sulfonylmorpholine chemical structure, C18H17N3O3S2, CAS 618063-15-3](/s/SIUNNPDZIMVPSN-UHFFFAOYSA-N.svg)
4-[4-(2-Pyridin-3-yl-1,3-thiazol-4-yl)phenyl]sulfonylmorpholine
CAS 618063-15-3C18H17N3O3S2
2-(1,3-Benzothiazol-2-ylsulfanyl)-N'-(2,5-dimethoxybenzylidene)acetohydrazide
CAS 343357-76-6C18H17N3O3S2
![N-(2-(3,4-Dimethylphenyl)-5,5-dioxido-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)thiophene-2-carboxamide chemical structure, C18H17N3O3S2, CAS 681267-29-8](/s/NDSVBCOTTAVESZ-UHFFFAOYSA-N.svg)
N-(2-(3,4-Dimethylphenyl)-5,5-dioxido-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)thiophene-2-carboxamide
CAS 681267-29-8C18H17N3O3S2
4-Acetyl-N-(2-(2-(pyridin-3-yl)thiazol-4-yl)ethyl)benzenesulfonamide
CAS 863511-89-1C18H17N3O3S2
![4-[Ethyl(phenyl)sulfamoyl]-N-(1,3-thiazol-2-yl)benzamide chemical structure, C18H17N3O3S2, CAS 764694-08-8](/s/FPVRKDQPHQGFNM-UHFFFAOYSA-N.svg)
4-[Ethyl(phenyl)sulfamoyl]-N-(1,3-thiazol-2-yl)benzamide
CAS 764694-08-8C18H17N3O3S2
![3-(4-Methylbenzenesulfonyl)-N-[4-(pyridin-3-yl)-1,3-thiazol-2-yl]propanamide chemical structure, C18H17N3O3S2, CAS 895443-15-9](/s/DKIAPNVFJMIYIV-UHFFFAOYSA-N.svg)
3-(4-Methylbenzenesulfonyl)-N-[4-(pyridin-3-yl)-1,3-thiazol-2-yl]propanamide
CAS 895443-15-9C18H17N3O3S2
![N-(2,3-Dihydro-1,4-benzodioxin-6-ylmethyl)-N-methyl-2-thieno[2,3-d]pyrimidin-4-ylsulfanylacetamide chemical structure, C18H17N3O3S2, CAS 878610-18-5](/s/IUHWEHUMMMNBSW-UHFFFAOYSA-N.svg)
N-(2,3-Dihydro-1,4-benzodioxin-6-ylmethyl)-N-methyl-2-thieno[2,3-d]pyrimidin-4-ylsulfanylacetamide
CAS 878610-18-5C18H17N3O3S2
2-((2-Phenyl-4-tosyl-1H-imidazol-5-yl)thio)acetamide
CAS 931324-41-3C18H17N3O3S2
N-(1,3-Benzothiazol-2-yl)-4-(pyrrolidin-1-ylsulfonyl)benzamide
CAS 486401-00-7C18H17N3O3S2
![(5Z)-5-[[1-(2-Morpholin-4-yl-2-oxoethyl)indol-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one chemical structure, C18H17N3O3S2, CAS 347326-99-2](/s/UIBLRHVULYMOLB-DHDCSXOGSA-N.svg)
(5Z)-5-[[1-(2-Morpholin-4-yl-2-oxoethyl)indol-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
CAS 347326-99-2C18H17N3O3S2
![2-[(4-Methylquinolin-2-yl)sulfanyl]-N-(4-sulfamoylphenyl)acetamide chemical structure, C18H17N3O3S2, CAS 315694-46-3](/s/ZKHJORBCRDGCKH-UHFFFAOYSA-N.svg)
2-[(4-Methylquinolin-2-yl)sulfanyl]-N-(4-sulfamoylphenyl)acetamide
CAS 315694-46-3C18H17N3O3S2
![1-(3,4-Dihydroquinolin-1(2H)-yl)-2-((1,1-dioxido-4H-benzo[e][1,2,4]thiadiazin-3-yl)thio)ethanone chemical structure, C18H17N3O3S2, CAS 899975-98-5](/s/SYJXSKFDFRHLCL-UHFFFAOYSA-N.svg)
1-(3,4-Dihydroquinolin-1(2H)-yl)-2-((1,1-dioxido-4H-benzo[e][1,2,4]thiadiazin-3-yl)thio)ethanone
CAS 899975-98-5C18H17N3O3S2
2-(4-(Pyridine-3-sulfonamido)phenyl)-N-(thiophen-2-ylmethyl)acetamide
CAS 1207056-22-1C18H17N3O3S2
![N-(Benzo[d][1,3]dioxol-5-ylmethyl)-2-((5,6-dimethylthieno[2,3-d]pyrimidin-4-yl)thio)acetamide chemical structure, C18H17N3O3S2, CAS 460727-31-5](/s/YYFLWIKDVTZOCY-UHFFFAOYSA-N.svg)
N-(Benzo[d][1,3]dioxol-5-ylmethyl)-2-((5,6-dimethylthieno[2,3-d]pyrimidin-4-yl)thio)acetamide
CAS 460727-31-5C18H17N3O3S2
![2-[5-(4-Methoxyphenyl)-4-oxo-3-prop-2-enylthieno[2,3-d]pyrimidin-2-yl]sulfanylacetamide chemical structure, C18H17N3O3S2, CAS 670273-61-7](/s/HYDMUICROFRHHF-UHFFFAOYSA-N.svg)
2-[5-(4-Methoxyphenyl)-4-oxo-3-prop-2-enylthieno[2,3-d]pyrimidin-2-yl]sulfanylacetamide
CAS 670273-61-7C18H17N3O3S2
![2-(1,3-Benzothiazol-2-ylsulfanyl)-N'-[(E)-(2,3-dimethoxyphenyl)methylidene]acetohydrazide chemical structure, C18H17N3O3S2, CAS 330663-69-9](/s/PQZGNCOEQVQSRY-VXLYETTFSA-N.svg)
2-(1,3-Benzothiazol-2-ylsulfanyl)-N'-[(E)-(2,3-dimethoxyphenyl)methylidene]acetohydrazide
CAS 330663-69-9C18H17N3O3S2
- 4-Methoxy-N-(4-(2-oxo-2-((thiophen-2-ylmethyl)amino)ethyl)thiazol-2-yl)benzamide941947-41-7C18H17N3O3S2
- 4-(Isopropylsulfonyl)-N-(4-(pyridin-4-yl)thiazol-2-yl)benzamide941993-21-1C18H17N3O3S2
- N-Phenethyl-2-(phenylsulfonamido)thiazole-4-carboxamide1021212-84-9C18H17N3O3S2
- N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-(5,6-dimethylthieno[2,3-d]pyrimidin-4-yl)sulfanylacetamide483984-18-5C18H17N3O3S2
- 3,5-Dimethoxy-N-((2-methylbenzo[d]thiazol-6-yl)carbamothioyl)benzamide396724-84-8C18H17N3O3S2
- N-(3,5-Dimethoxyphenyl)-2-(6-thiophen-2-ylpyridazin-3-yl)sulfanylacetamide893991-46-3C18H17N3O3S2
- 4-(Isopropylsulfonyl)-N-(4-(pyridin-2-yl)thiazol-2-yl)benzamide941868-57-1C18H17N3O3S2
- 4-[Benzyl(methyl)sulfamoyl]-N-(1,3-thiazol-2-yl)benzamide683761-23-1C18H17N3O3S2
- 3,4-Dimethyl-N-(4-(N-(thiazol-2-yl)sulfamoyl)phenyl)benzamide329226-27-9C18H17N3O3S2
- N-(6-Pyrrolidin-1-ylsulfonyl-1,3-benzothiazol-2-yl)benzamide708245-27-6C18H17N3O3S2
- 2-{[5-(4-Methoxyphenyl)-1,3,4-oxadiazol-2-yl]sulfanyl}-N-[3-(methylsulfanyl)phenyl]acetamide665018-34-8C18H17N3O3S2
- 4-[[2-[(6-Ethoxy-1,3-benzothiazol-2-yl)sulfanyl]acetyl]amino]benzamide361184-87-4C18H17N3O3S2
- N-[5-[2-(4-Methylphenyl)sulfonylethyl]-1,3,4-thiadiazol-2-yl]benzamide313260-71-8C18H17N3O3S2
- Ethyl 4-methyl-2-{[(4-methyl-2-phenyl-1,3-thiazol-5-yl)carbonyl]amino}-1,3-thiazole-5-carboxylate892360-00-8C18H17N3O3S2
- 2-{[4-(Morpholinomethyl)-2-nitrophenyl]sulfanyl}-1,3-benzothiazole477869-47-9C18H17N3O3S2
- N-(3-Cyanothiophen-2-yl)-4-(N,N-diallylsulfamoyl)benzamide865545-93-3C18H17N3O3S2
- Ethyl 2-[[5-(naphthalene-2-carbonylamino)-1,3,4-thiadiazol-2-yl]sulfanyl]propanoate391874-93-4C18H17N3O3S2
- N-(6-Sulfamoyl-1,3-benzothiazol-2-yl)-5,6,7,8-tetrahydronaphthalene-2-carboxamide681166-75-6C18H17N3O3S2
- N-(3-Hydroxyphenyl)-2-(6-methyl-4-oxo-3-prop-2-enylthieno[2,3-d]pyrimidin-2-yl)sulfanylacetamide878699-16-2C18H17N3O3S2
- N-(1-(1,1-Dioxidotetrahydrothiophen-3-yl)-3-phenyl-1H-pyrazol-5-yl)thiophene-2-carboxamide942676-64-4C18H17N3O3S2
- 2-[(6-Acetamido-1,3-benzothiazol-2-yl)sulfanyl]-N-(2-methoxyphenyl)acetamide425653-83-4C18H17N3O3S2
- N-[5-(2-Methoxyethylsulfanyl)-1,3,4-thiadiazol-2-yl]-2-phenoxybenzamide825598-44-5C18H17N3O3S2
- 2-(Benzenesulfonyl)-N-[5-(2-phenylethyl)-1,3,4-thiadiazol-2-yl]acetamide827620-91-7C18H17N3O3S2
- (Z)-N-(3-Allyl-6-sulfamoylbenzo[d]thiazol-2(3H)-ylidene)-2-phenylacetamide6274-95-9C18H17N3O3S2
- (E)-Ethyl 3-cyano-2-(3-(thiophen-2-yl)acrylamido)-4,5-dihydrothieno[2,3-c]pyridine-6(7H)-carboxylate871015-13-3C18H17N3O3S2
- 4-[Methyl-(4-methylphenyl)sulfonylamino]-N-(1,3-thiazol-2-yl)benzamide946202-67-1C18H17N3O3S2
- N-Benzyl-4-methyl-2-(phenylsulfonamido)thiazole-5-carboxamide955640-89-8C18H17N3O3S2
- N-(4-(3-((2-(Methylthio)phenyl)amino)-3-oxopropyl)thiazol-2-yl)furan-2-carboxamide1021229-15-1C18H17N3O3S2
- Ethyl (2-{[(2-methyl-5-phenyl-1,3-thiazol-4-yl)carbonyl]amino}-1,3-thiazol-4-yl)acetate1401588-53-1C18H17N3O3S2
- N-(2-Methylbenzo[d]thiazol-5-yl)-5-oxo-4-(thiophen-2-ylmethyl)morpholine-3-carboxamide1421448-97-6C18H17N3O3S2
- 2-(1,3-Benzothiazol-2-ylsulfanyl)-N'-(3-ethoxy-4-hydroxybenzylidene)acetohydrazide352558-85-1C18H17N3O3S2
- Dhx9-IN-122973747-13-4C18H17N3O3S2
- Methyl 4-({[(5,6-dimethylthieno[2,3-d]pyrimidin-4-yl)sulfanyl]acetyl}amino)benzoate482635-00-7C18H17N3O3S2
- N-[4-(4-tert-Butylphenyl)-1,3-thiazol-2-yl]-5-nitrothiophene-2-carboxamide307510-59-4C18H17N3O3S2
- 3-Methyl-2-[(4-nitrobenzyl)sulfanyl]-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidin-4(3H)-one700833-55-2C18H17N3O3S2
- 5,6-Dimethyl-2-[(4-nitrophenyl)methylsulfanyl]-3-prop-2-enylthieno[2,3-d]pyrimidin-4-one679821-72-8C18H17N3O3S2
- (5Z)-5-[(4-Oxochromen-3-yl)methylidene]-2-sulfanylidene-3-(thiomorpholin-4-ylmethyl)imidazolidin-4-one865659-99-0C18H17N3O3S2
- 2-Quinolin-2-ylsulfanyl-N-[(4-sulfamoylphenyl)methyl]acetamide727422-29-9C18H17N3O3S2
- N-(4-(3,4-Dimethoxyphenyl)thiazol-2-yl)-2-(methylthio)nicotinamide784160-43-6C18H17N3O3S2
- 2-[[5-(3,5-Dimethoxyphenyl)-1,3,4-thiadiazol-2-yl]sulfanyl]-N-phenylacetamide838865-80-8C18H17N3O3S2
- N-(4-(2,5-Dimethoxyphenyl)thiazol-2-yl)-2-(methylthio)nicotinamide756865-41-5C18H17N3O3S2
- N-(2-Methoxyphenyl)-2-((3-(4-methoxyphenyl)-1,2,4-thiadiazol-5-yl)thio)acetamide864922-33-8C18H17N3O3S2
- N-(3-Methoxyphenyl)-2-((3-(4-methoxyphenyl)-1,2,4-thiadiazol-5-yl)thio)acetamide864922-34-9C18H17N3O3S2
- N-(4-Methoxyphenyl)-2-((3-(4-methoxyphenyl)-1,2,4-thiadiazol-5-yl)thio)acetamide864922-35-0C18H17N3O3S2
- N-(5-(Benzylthio)-1,3,4-thiadiazol-2-yl)-3,5-dimethoxybenzamide393569-48-7C18H17N3O3S2
- Ethyl (2-{[(4-methyl-2-phenyl-1,3-thiazol-5-yl)carbonyl]amino}-1,3-thiazol-4-yl)acetate892359-71-6C18H17N3O3S2
- (E)-3,5-Dimethoxy-N-((3-methylbenzo[d]thiazol-2(3H)-ylidene)carbamothioyl)benzamide477324-38-2C18H17N3O3S2
- N-(5-(2,4-Dimethoxyphenyl)-1,3,4-thiadiazol-2-yl)-2-(phenylthio)acetamide394232-89-4C18H17N3O3S2
- 3-(Isopropylsulfonyl)-N-(4-(pyridin-4-yl)thiazol-2-yl)benzamide941972-88-9C18H17N3O3S2
- 2-((4-(Phenylsulfonyl)-2-(p-tolyl)-1H-imidazol-5-yl)thio)acetamide950304-99-1C18H17N3O3S2
- Methyl 5-benzyl-2-{[(2,4-dimethyl-1,3-thiazol-5-yl)carbonyl]amino}-1,3-thiazole-4-carboxylate1374532-01-0C18H17N3O3S2
- Methyl 2-{[(4-ethyl-2-methyl-1,3-thiazol-5-yl)carbonyl]amino}-5-phenyl-1,3-thiazole-4-carboxylate1351683-99-2C18H17N3O3S2
- (E)-5-(1-(Styrylsulfonyl)azetidin-3-yl)-3-(thiophen-2-ylmethyl)-1,2,4-oxadiazole1351664-28-2C18H17N3O3S2
- N-(4-Methylbenzo[d]thiazol-2-yl)-5-oxo-4-(thiophen-2-ylmethyl)morpholine-3-carboxamide1421444-80-5C18H17N3O3S2
- 2-(1,3-Benzothiazol-2-ylsulfanyl)-N'-[(1E)-1-(4-hydroxy-3-methoxyphenyl)ethylidene]acetohydrazide303202-75-7C18H17N3O3S2
- 4-(Dimethylsulfamoyl)-N-(4-phenyl-1,3-thiazol-2-yl)benzamide313646-73-0C18H17N3O3S2
- N-(Benzo[d]thiazol-5-yl)-4-(pyrrolidin-1-ylsulfonyl)benzamide942002-62-2C18H17N3O3S2
- (E)-N-(2-(6-Oxo-3-(thiophen-2-yl)pyridazin-1(6H)-yl)ethyl)-2-phenylethenesulfonamide954034-57-2C18H17N3O3S2
- 4-(Phenylsulfonyl)-N-(4-(pyridin-3-yl)thiazol-2-yl)butanamide923000-14-0C18H17N3O3S2
- 2-(4-(Ethylsulfonyl)phenyl)-N-(4-(pyridin-2-yl)thiazol-2-yl)acetamide941972-19-6C18H17N3O3S2
- N-(2-((2-(Ethylamino)-2-oxoethyl)thio)-4-phenylthiazol-5-yl)furan-2-carboxamide946327-96-4C18H17N3O3S2
- N-(3-Acetylphenyl)-2-({3-ethyl-4-oxo-3H,4H-thieno[3,2-d]pyrimidin-2-yl}sulfanyl)acetamide1252861-83-8C18H17N3O3S2
- N-(4-Acetylphenyl)-2-({3-ethyl-4-oxo-3H,4H-thieno[3,2-d]pyrimidin-2-yl}sulfanyl)acetamide1252915-79-9C18H17N3O3S2
- N-(1-(Methylsulfonyl)-1,2,3,4-tetrahydroquinolin-7-yl)benzo[d]thiazole-2-carboxamide1207033-54-2C18H17N3O3S2
- (E)-5-(1-((4-Methylstyryl)sulfonyl)azetidin-3-yl)-3-(thiophen-2-yl)-1,2,4-oxadiazole1331457-00-1C18H17N3O3S2
- (Z)-N-(3-Allyl-6-sulfamoylbenzo[d]thiazol-2(3H)-ylidene)-2-methylbenzamide887200-98-8C18H17N3O3S2
- (Z)-N-(3-Allyl-6-sulfamoylbenzo[d]thiazol-2(3H)-ylidene)-4-methylbenzamide887199-51-1C18H17N3O3S2
- (Z)-N-(3-Allyl-6-sulfamoylbenzo[d]thiazol-2(3H)-ylidene)-3-methylbenzamide887199-54-4C18H17N3O3S2
- N-(2,5-Dimethoxyphenyl)-2-[(3-phenyl-1,2,4-thiadiazol-5-yl)sulfanyl]acetamide864856-15-5C18H17N3O3S2
- Ethyl 2-[(4-ethylthiadiazole-5-carbonyl)amino]-4-phenylthiophene-3-carboxylate899975-73-6C18H17N3O3S2
- 3-(Propane-2-sulfonyl)-N-[4-(pyridin-3-yl)-1,3-thiazol-2-yl]benzamide899738-89-7C18H17N3O3S2
- 2-(2-Benzenesulfonamido-1,3-thiazol-4-yl)-N-(3-methylphenyl)acetamide921910-19-2C18H17N3O3S2
- 2-(2-Benzenesulfonamido-1,3-thiazol-4-yl)-N-(4-methylphenyl)acetamide922130-29-8C18H17N3O3S2
- Ethyl 4-((2-methyl-7-phenylthiazolo[4,5-d]pyridazin-4-yl)thio)-3-oxobutanoate946255-62-5C18H17N3O3S2
- N-[4-(2,4-Dimethoxyphenyl)-1,3-thiazol-2-yl]-2-(methylsulfanyl)pyridine-3-carboxamide950090-05-8C18H17N3O3S2
- 2-(2-Benzenesulfonamido-1,3-thiazol-4-yl)-N-benzylacetamide922001-53-4C18H17N3O3S2
Frequently asked questions
What is the molar mass of C18H17N3O3S2?
The molar mass of C18H17N3O3S2 is 387.47 g/mol, calculated from standard atomic weights for 18 carbon atoms, 17 hydrogen atoms, 3 nitrogen atoms, 3 oxygen atoms and 2 sulfur atoms. The monoisotopic mass is 387.0711 Da.
How many compounds have the formula C18H17N3O3S2?
CompoundList lists 125 compounds with the molecular formula C18H17N3O3S2, including 6-[(3-Methoxyphenyl)methyl]-4-methyl-2-methylsulfinyl-5-thieno[3,4]pyrrolo[1,3-d]pyridazinone, 3-Phenyl-N-{4-[(1,3-thiazol-2-ylamino)sulfonyl]phenyl}propanamide, 3-[3-(Pyrrolidine-1-sulfonyl)phenyl]-2-sulfanyl-3,4-dihydroquinazolin-4-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 C18H17N3O3S2?
C18H17N3O3S2 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.