Molecular formula
C18H18N2O3S
368 compounds have this formula on CompoundList.
- Molar mass
- 342.41g/mol
- Monoisotopic mass
- 342.1038Da
- Atoms
- 42
- Elements
- 5
- Rings plus double bonds
- 11
The formula C18H18N2O3S describes a molecule made of 18 carbon atoms, 18 hydrogen atoms, 2 nitrogen atoms, 3 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 × 1863.14%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 185.30%1.008 × 18 = 18.144 g/mol
- N Nitrogen × 28.18%14.007 × 2 = 28.014 g/mol
- O Oxygen × 314.02%15.999 × 3 = 47.997 g/mol
- S Sulfur × 19.36%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C18H18N2O3S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 368 compounds
RefChem:381840
CAS 6097-79-6C18H18N2O3S
5-(3,4-Dimethoxyphenyl)-3-(4-methoxyphenyl)-1H-imidazole-2-thione
CAS 866346-43-2C18H18N2O3S
4-Ethoxy-N-(pyridin-3-ylmethyl)naphthalene-1-sulfonamide
CAS 312598-54-2C18H18N2O3S
![3-{[1-(2-Phenoxyethyl)-1H-benzimidazol-2-yl]-thio}propanoic acid chemical structure, C18H18N2O3S, CAS 303132-91-4](/s/UPRAXQDJCBOLJY-UHFFFAOYSA-N.svg)
3-{[1-(2-Phenoxyethyl)-1H-benzimidazol-2-yl]-thio}propanoic acid
CAS 303132-91-4C18H18N2O3S
2-(2,4-Dioxo-3-propyl-thiazolidin-5-yl)-N-naphthalen-1-yl-acetamide
CAS 488843-88-5C18H18N2O3S
![[2-(2-m-Tolyloxy-ethylsulfanyl)-benzoimidazol-1-yl]-acetic acid chemical structure, C18H18N2O3S, CAS 325856-09-5](/s/RVCGIIJRZYPCIK-UHFFFAOYSA-N.svg)
[2-(2-m-Tolyloxy-ethylsulfanyl)-benzoimidazol-1-yl]-acetic acid
CAS 325856-09-5C18H18N2O3S
Benzyl 1,6-dimethyl-2-oxo-4-(3-thienyl)-1,2,3,4-tetrahydro-5-pyrimidinecarboxylate
CAS 312623-17-9C18H18N2O3S
![N-Benzyl-11-oxo-1-azatricyclo[6.3.1.0^{4,12}]dodeca-4(12),5,7-triene-6-sulfonamide chemical structure, C18H18N2O3S, CAS 898462-40-3](/s/HYVMZVLALFCZMN-UHFFFAOYSA-N.svg)
N-Benzyl-11-oxo-1-azatricyclo[6.3.1.0^{4,12}]dodeca-4(12),5,7-triene-6-sulfonamide
CAS 898462-40-3C18H18N2O3S
![5-Isopropyl-2-phenyl-3-thiophen-2-yl-tetrahydro-pyrrolo[3,4-d]isoxazole-4,6-dione chemical structure, C18H18N2O3S, CAS 1005262-32-7](/s/MMLCMSFBBUAHTF-UHFFFAOYSA-N.svg)
5-Isopropyl-2-phenyl-3-thiophen-2-yl-tetrahydro-pyrrolo[3,4-d]isoxazole-4,6-dione
CAS 1005262-32-7C18H18N2O3S
![[2-(2-p-Tolyloxy-ethylsulfanyl)-benzoimidazol-1-yl]-acetic acid chemical structure, C18H18N2O3S, CAS 313964-39-5](/s/IAPUDLWFEXAJCG-UHFFFAOYSA-N.svg)
[2-(2-p-Tolyloxy-ethylsulfanyl)-benzoimidazol-1-yl]-acetic acid
CAS 313964-39-5C18H18N2O3S
![(E)-Methyl 8-methyl-4-oxo-6-styryl-2,3,4,6-tetrahydropyrimido[2,1-b][1,3]thiazine-7-carboxylate chemical structure, C18H18N2O3S, CAS 1164526-88-8](/s/IGDSSVASLPFMGC-CMDGGOBGSA-N.svg)
(E)-Methyl 8-methyl-4-oxo-6-styryl-2,3,4,6-tetrahydropyrimido[2,1-b][1,3]thiazine-7-carboxylate
CAS 1164526-88-8C18H18N2O3S
![Methyl 2,7-dimethyl-3-oxo-5-[(E)-2-phenylethenyl]-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate chemical structure, C18H18N2O3S, CAS 1164459-38-4](/s/XJBNAGZFOCCCHZ-MDZDMXLPSA-N.svg)
Methyl 2,7-dimethyl-3-oxo-5-[(E)-2-phenylethenyl]-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
CAS 1164459-38-4C18H18N2O3S
N,N-Dimethyl-4-(2-methylindolizine-3-carbonyl)benzenesulfonamide
CAS 521320-99-0C18H18N2O3S
![N-[(4-Methoxyphenyl)methyl]-2-(3-oxo-3,4-dihydro-2H-1,4-benzothiazin-2-yl)acetamide chemical structure, C18H18N2O3S, CAS 577788-35-3](/s/OYSNWDLBTMQHNZ-UHFFFAOYSA-N.svg)
N-[(4-Methoxyphenyl)methyl]-2-(3-oxo-3,4-dihydro-2H-1,4-benzothiazin-2-yl)acetamide
CAS 577788-35-3C18H18N2O3S
![{1-Methyl-5-[(4-methylphenyl)sulfonyl]-3-phenyl-1H-pyrazol-4-yl}methanol chemical structure, C18H18N2O3S, CAS 318234-00-3](/s/XTESZNSYJJGDQR-UHFFFAOYSA-N.svg)
{1-Methyl-5-[(4-methylphenyl)sulfonyl]-3-phenyl-1H-pyrazol-4-yl}methanol
CAS 318234-00-3C18H18N2O3S
10-((3,4-Dimethoxyphenyl)methyl)-7-thia-9,11-diazatricyclo(6.4.0.0,2,6)dodeca-1(8),2(6),9-trien-12-one
CAS 731797-75-4C18H18N2O3S
N-(2-Methoxybenzyl)-2-(3-oxo-3,4-dihydro-2H-1,4-benzothiazin-2-yl)acetamide
CAS 860611-83-2C18H18N2O3S
5-Oxo-5-(5-phenyl-3-thiophen-2-yl-3,4-dihydropyrazol-2-yl)pentanoic acid
CAS 724437-45-0C18H18N2O3S
![3-Oxo-N-phenyl-1,2,3,5,6,7-hexahydropyrido[3,2,1-ij]quinoline-9-sulfonamide chemical structure, C18H18N2O3S, CAS 898438-65-8](/s/SRABAKASUQOECH-UHFFFAOYSA-N.svg)
3-Oxo-N-phenyl-1,2,3,5,6,7-hexahydropyrido[3,2,1-ij]quinoline-9-sulfonamide
CAS 898438-65-8C18H18N2O3S
4-Ethoxy-N-(pyridin-2-ylmethyl)naphthalene-1-sulfonamide
CAS 443904-37-8C18H18N2O3S
4-Ethoxy-N-(3-methylpyridin-2-yl)naphthalene-1-sulfonamide
CAS 838881-39-3C18H18N2O3S
![N-[(3-Methoxyphenyl)methyl]-2-(3-oxo-4H-1,4-benzothiazin-2-yl)acetamide chemical structure, C18H18N2O3S, CAS 860611-61-6](/s/AUXUABSFDMRHTG-UHFFFAOYSA-N.svg)
N-[(3-Methoxyphenyl)methyl]-2-(3-oxo-4H-1,4-benzothiazin-2-yl)acetamide
CAS 860611-61-6C18H18N2O3S
![1-(4-Acetyl-5-methyl-1,3-thiazol-2-yl)-3-[(4-methylphenyl)methyl]pyrrolidine-2,5-dione chemical structure, C18H18N2O3S, CAS 717862-35-6](/s/WNAMEALLLJFHIN-UHFFFAOYSA-N.svg)
1-(4-Acetyl-5-methyl-1,3-thiazol-2-yl)-3-[(4-methylphenyl)methyl]pyrrolidine-2,5-dione
CAS 717862-35-6C18H18N2O3S
![2-[(4-Cyanobenzyl)sulfanyl]-N-(2,4-dimethoxyphenyl)acetamide chemical structure, C18H18N2O3S, CAS 330968-05-3](/s/VQDULKXWDOZYKK-UHFFFAOYSA-N.svg)
2-[(4-Cyanobenzyl)sulfanyl]-N-(2,4-dimethoxyphenyl)acetamide
CAS 330968-05-3C18H18N2O3S
- 4-Ethoxy-N-(4-methyl-2-pyridinyl)-1-naphthalenesulfonamide457960-61-1C18H18N2O3S
- 4-[5-(4-Methylphenyl)-3-thiophen-2-yl-3,4-dihydropyrazol-2-yl]-4-oxobutanoic acid799794-51-7C18H18N2O3S
- N-{2-[2-(4-Methoxyphenyl)-4-methyl-1,3-thiazol-5-yl]ethyl}furan-2-carboxamide869070-18-8C18H18N2O3S
- 2-[2-(4-Ethoxyphenoxy)ethylsulfanyl]-1H-quinazolin-4-one326903-85-9C18H18N2O3S
- (5Z)-3-(4-Ethoxyphenyl)-1-methyl-5-[(5-methylfuran-2-yl)methylidene]-2-sulfanylideneimidazolidin-4-one1164563-44-3C18H18N2O3S
- 2-Oxo-N-(3-phenylpropyl)-1,2-dihydroquinoline-6-sulfonamide891897-62-4C18H18N2O3S
- (E)-3-(3,4-Dimethoxyphenyl)-N-(phenylcarbamothioyl)prop-2-enamide412964-00-2C18H18N2O3S
- N-(2,3-Dihydro-1,4-benzodioxin-6-ylcarbamothioyl)-4-ethylbenzamide639057-13-9C18H18N2O3S
- 2-Methoxy-N-(4-methoxy-3,7-dimethyl-1,3-benzothiazol-2-ylidene)benzamide868370-49-4C18H18N2O3S
- 2-((2,3-Dihydro-1H-inden-5-yl)amino)-2-oxoethyl 2-(methylthio)nicotinate562800-17-3C18H18N2O3S
- 6-(2,3-Dimethylphenoxy)-N-(2-oxothiolan-3-yl)pyridine-3-carboxamide321521-93-1C18H18N2O3S
- 5-[(E)-(Dimethylamino)methylidene]-3-(4-phenoxyphenyl)-1lambda~4~,3-thiazolane-1,4-dione1164505-00-3C18H18N2O3S
- N-(4-Ethoxyphenyl)-2-(3-oxo-3,4-dihydro-2H-1,4-benzothiazin-2-yl)acetamide109599-95-3C18H18N2O3S
- N-[(2-Methoxyphenyl)methyl]-3-(2-oxo-1,3-benzothiazol-3-yl)propanamide851989-65-6C18H18N2O3S
- N-(2-Methoxyethyl)-2-[3-(thiophene-2-carbonyl)indol-1-yl]acetamide678191-05-4C18H18N2O3S
- 3-Methoxy-N-(4-methoxy-3,7-dimethyl-1,3-benzothiazol-2-ylidene)benzamide1164536-22-4C18H18N2O3S
- 4-Methoxy-N-(4-methoxy-3,7-dimethyl-1,3-benzothiazol-2-ylidene)benzamide1164471-44-6C18H18N2O3S
- 4-[(3,5-Dimethyl-1,2-oxazol-4-yl)methoxy]-N-(thiophen-2-ylmethyl)benzamide850343-15-6C18H18N2O3S
- 4-Methyl-N-(4-oxo-2,4,5,6-tetrahydro-1H-pyrrolo[3,2,1-ij]quinolin-8-yl)benzenesulfonamide898418-84-3C18H18N2O3S
- N-(3-Oxo-1,2,3,5,6,7-hexahydropyrido[3,2,1-ij]quinolin-9-yl)benzenesulfonamide898412-08-3C18H18N2O3S
- N-(4,6-Dimethylpyridin-2-yl)-4-methoxynaphthalene-1-sulfonamide540514-11-2C18H18N2O3S
- 5-Oxazolamine, N,N-dimethyl-4-[(4-methylphenyl)sulfonyl]-2-phenyl-117847-47-9C18H18N2O3S
- N-(6-Ethoxy-1,3-benzothiazol-2-yl)-2-(4-methoxyphenyl)acetamide356082-46-7C18H18N2O3S
- Ethyl 6-methyl-2-oxo-4-(4-phenyl-2-thienyl)-1,2,3,4-tetrahydro-5-pyrimidinecarboxylate853315-28-3C18H18N2O3S
- 6-[(5-Methyl-4-phenyl-1,3-thiazol-2-yl)carbamoyl]cyclohex-3-ene-1-carboxylic acid353789-38-5C18H18N2O3S
- 4-Methyl-N-(2-oxo-2,4,5,6-tetrahydro-1H-pyrrolo[3,2,1-ij]quinolin-8-yl)benzenesulfonamide898454-57-4C18H18N2O3S
- 1-Phenyl-3-(o-tolyl)tetrahydro-1H-thieno[3,4-d]imidazol-2(3H)-one 5,5-dioxide324780-52-1C18H18N2O3S
- N-(1-Methyl-2-oxo-2,4,5,6-tetrahydro-1H-pyrrolo[3,2,1-ij]quinolin-8-yl)benzenesulfonamide906162-11-6C18H18N2O3S
- tert-Butyl (4-oxo-7-phenylthieno[3,2-d]pyrimidin-3(4H)-yl)acetate1105237-99-7C18H18N2O3S
- Ethyl 3-benzyl-2,5-dimethyl-4-oxo-3,4-dihydrothieno[3,4-d]pyrimidine-7-carboxylate352555-48-7C18H18N2O3S
- 4-Ethoxy-N-(6-ethoxy-1,3-benzothiazol-2-yl)benzamide15850-89-2C18H18N2O3S
- N-(3-Cyano-4,5,6,7-tetrahydro-1-benzothiophen-2-yl)-2-(2-methoxyphenoxy)acetamide373611-52-0C18H18N2O3S
- N-[6-Methoxy-3-(2-methoxyethyl)-1,3-benzothiazol-2-ylidene]benzamide865161-21-3C18H18N2O3S
- 2-(1-Methylindol-3-yl)sulfonyl-N-(4-methylphenyl)acetamide686743-46-4C18H18N2O3S
- 2-(3,4-Dihydroquinolin-1(2H)-yl)-2-oxoethyl 2-(methylthio)nicotinate475055-51-7C18H18N2O3S
- (3-Amino-4,6-dimethylthieno[2,3-b]pyridin-2-yl)(3,4-dimethoxyphenyl)methanone311333-24-1C18H18N2O3S
- (2-([2-(2-Methylphenoxy)ethyl]thio)-1H-benzimidazol-1-yl)acetic acid313240-27-6C18H18N2O3S
- 3-Phenyl-5-(((2,4,5-trimethylphenyl)sulfonyl)methyl)-1,2,4-oxadiazole1105199-11-8C18H18N2O3S
- N-(3-Cyano-4,5,6,7-tetrahydro-1-benzothiophen-2-yl)-3,4-dimethoxybenzamide313273-94-8C18H18N2O3S
- (E)-N-(3-Ethyl-4-methoxybenzo[d]thiazol-2(3H)-ylidene)-3-methoxybenzamide864925-29-1C18H18N2O3S
- Isopropyl 2-(4-oxo-7-(o-tolyl)thieno[3,2-d]pyrimidin-3(4H)-yl)acetate1207040-97-8C18H18N2O3S
- N-(4-Methyl-5-oxo-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepin-7-yl)-2-(methylthio)benzamide1206985-25-2C18H18N2O3S
- Ethyl 4-[(3-methylbenzoyl)carbamothioylamino]benzoate428843-41-8C18H18N2O3S
- 4-Oxo-N-(m-tolyl)-2,4,5,6-tetrahydro-1H-pyrrolo[3,2,1-ij]quinoline-8-sulfonamide898462-48-1C18H18N2O3S
- N-(4-(5,6,7,8-Tetrahydronaphthalen-2-yl)thiazol-2-yl)-5,6-dihydro-1,4-dioxine-2-carboxamide864938-35-2C18H18N2O3S
- Ethyl 4-({[(4-methylbenzoyl)amino]carbothioyl}amino)benzoate333740-29-7C18H18N2O3S
- N-(4,6-Dimethyl-1,3-benzothiazol-2-yl)-3,5-dimethoxybenzamide313262-39-4C18H18N2O3S
- N-(2-Ethoxyphenyl)-2-(3-oxo-3,4-dihydro-2H-1,4-benzothiazin-2-yl)acetamide303796-62-5C18H18N2O3S
- N-(6-Ethoxy-1,3-benzothiazol-2-yl)-2-(3-methoxyphenyl)acetamide877942-67-1C18H18N2O3S
- 5-((Mesitylsulfonyl)methyl)-3-phenyl-1,2,4-oxadiazole1105199-05-0C18H18N2O3S
- 3-[2-(3,4-Dimethoxy-phenyl)-ethyl]-2-mercapto-3H-quinazolin-4-one361150-63-2C18H18N2O3S
- 1 suppliersFmoc-l-cys-nh2623177-62-8C18H18N2O3S
- N-(5,6-Dimethoxybenzo[d]thiazol-2-yl)-2-(p-tolyl)acetamide923493-17-8C18H18N2O3S
- N-(2,4-Dimethylphenyl)-4-methyl-2-oxo-1,2-dihydroquinoline-6-sulfonamide899998-25-5C18H18N2O3S
- 1H-Pyrazole-3-methanol, 5-[4-(methylsulfonyl)phenyl]-1-(phenylmethyl)-654058-51-2C18H18N2O3S
- 4-(Ethoxymethyl)-N-[2-(hydroxymethyl)-1,3-benzothiazol-5-yl]benzamide790689-83-7C18H18N2O3S
- N-[2-(Hydroxymethyl)-1,3-benzothiazol-5-yl]-4-isopropoxybenzamide790689-94-0C18H18N2O3S
- 2-(4-Methanesulfonylphenyl)-6-(4-methylphenyl)-2,3,4,5-tetrahydropyridazin-3-one1456819-38-7C18H18N2O3S
- N-[4-(2,3-Dihydro-1H-indol-1-ylsulfonyl)phenyl]cyclopropanecarboxamide433972-65-7C18H18N2O3S
- 3-Benzyl-6,7-dimethoxy-2-(methylsulfanyl)quinazolin-4(3H)-one1678513-98-8C18H18N2O3S
- 6-Ethoxy-N-(pyridin-3-ylmethyl)naphthalene-2-sulfonamide332021-94-0C18H18N2O3S
- 5-(4-Ethoxyanilino)-3-(4-methylphenyl)-1,3-thiazolidine-2,4-dione347841-11-6C18H18N2O3S
- 2-(3,4-Dimethoxyphenyl)-N-(6-methyl-1,3-benzothiazol-2-yl)acetamide349438-98-8C18H18N2O3S
- 4-Ethoxy-N-(pyridin-4-ylmethyl)naphthalene-1-sulfonamide499981-07-6C18H18N2O3S
- 1-[(2-Methoxy-5-methylphenyl)sulfonyl]-4-methyl-2-phenyl-1H-imidazole876894-75-6C18H18N2O3S
- N-[5-(4-Methoxybenzyl)-1,3-thiazol-2-yl]-2,5-dimethylfuran-3-carboxamide919033-85-5C18H18N2O3S
- 4-Ethoxy-N-(4-ethoxybenzo[d]thiazol-2-yl)benzamide15863-93-1C18H18N2O3S
- N-Benzothiazol-2-yl-4-(4-methoxy-phenoxy)-butyramide433954-55-3C18H18N2O3S
- 2-[5-(3,4-Dimethylphenyl)-6-methyl-4-oxothieno[2,3-d]pyrimidin-3-yl]propanoic acid685844-77-3C18H18N2O3S
- 2-Phenylethyl 6-methyl-2-oxo-4-(thiophen-2-yl)-1,2,3,4-tetrahydropyrimidine-5-carboxylate312623-20-4C18H18N2O3S
- Benzyl 6-methyl-4-(5-methylthiophen-2-yl)-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate312623-19-1C18H18N2O3S
- 1-Phenyl-3-(m-tolyl)tetrahydro-1H-thieno[3,4-d]imidazol-2(3H)-one 5,5-dioxide324780-51-0C18H18N2O3S
- 7-Methyl-1-oxo-N-(4,5,6,7-tetrahydro-1,3-benzothiazol-2-yl)-3,4-dihydroisochromene-3-carboxamide853890-31-0C18H18N2O3S
- N-Benzyl-1,4-dimethyl-2-oxoquinoline-6-sulfonamide728887-10-3C18H18N2O3S
- Methyl 2-[2-(2-phenoxyethylthio)benzimidazolyl]acetate920115-55-5C18H18N2O3S
- N-Methyl-2-(3-methylphenyl)-4-((4-methylphenyl)sulfonyl)-5-oxazolamine309735-89-5C18H18N2O3S
Frequently asked questions
What is the molar mass of C18H18N2O3S?
The molar mass of C18H18N2O3S is 342.41 g/mol, calculated from standard atomic weights for 18 carbon atoms, 18 hydrogen atoms, 2 nitrogen atoms, 3 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 342.1038 Da.
How many compounds have the formula C18H18N2O3S?
CompoundList lists 368 compounds with the molecular formula C18H18N2O3S, including RefChem:381840, 5-(3,4-Dimethoxyphenyl)-3-(4-methoxyphenyl)-1H-imidazole-2-thione, 4-Ethoxy-N-(pyridin-3-ylmethyl)naphthalene-1-sulfonamide. 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 C18H18N2O3S?
C18H18N2O3S 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.