Molecular formula
C18H21N3O
285 compounds have this formula on CompoundList.
- Molar mass
- 295.39g/mol
- Monoisotopic mass
- 295.1685Da
- Atoms
- 43
- Elements
- 4
- Rings plus double bonds
- 10
The formula C18H21N3O describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 1 oxygen 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 × 1873.19%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 217.17%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 314.23%14.007 × 3 = 42.021 g/mol
- O Oxygen × 15.42%15.999 × 1 = 15.999 g/mol
Look up another formula
Compounds with the formula C18H21N3O
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 285 compounds
Carbanilide, N-(1-methyl-3-pyrrolidinyl)-
CAS 19996-88-4C18H21N3O
(2,5-Dimethylphenyl)-(4-pyridin-2-ylpiperazin-1-yl)methanone
CAS 701241-41-0C18H21N3O
6H-Pyrrolo(3,4-d)pyrimidin-2(1H)-one, 1,6-diethyl-4,5-dimethyl-7-phenyl-
CAS 70886-88-3C18H21N3O
3-Quinolinecarboximidamide, 5,6,7,8-tetrahydro-2-methoxy-N-(4-methylphenyl)-
CAS 171011-12-4C18H21N3O
N-(1-Benzyl-3-cyano-4,5-dimethyl-1H-pyrrol-2-yl)butanamide
CAS 478033-00-0C18H21N3O
![4-tert-Butyl-N-[(E)-1-pyridin-3-ylethylideneamino]benzamide chemical structure, C18H21N3O, CAS 109352-40-1](/s/WGBQYGMZXDCICU-DEDYPNTBSA-N.svg)
4-tert-Butyl-N-[(E)-1-pyridin-3-ylethylideneamino]benzamide
CAS 109352-40-1C18H21N3O
2-(3-Methylphenyl)-1-(4-pyridin-2-ylpiperazin-1-yl)ethanone
CAS 898135-05-2C18H21N3O
![4,7-Dimethyl-2-[(2-phenylethyl)amino]-7,8-dihydroquinazolin-5(6H)-one chemical structure, C18H21N3O, CAS 919720-97-1](/s/BFENOGYSNWKDMP-UHFFFAOYSA-N.svg)
4,7-Dimethyl-2-[(2-phenylethyl)amino]-7,8-dihydroquinazolin-5(6H)-one
CAS 919720-97-1C18H21N3O
![3-(1H-Imidazol-1-yl)-N-[(2-methoxy-1-naphthyl)methyl]-1-propanamine chemical structure, C18H21N3O, CAS 940201-31-0](/s/CADGLOHJQMXCEJ-UHFFFAOYSA-N.svg)
3-(1H-Imidazol-1-yl)-N-[(2-methoxy-1-naphthyl)methyl]-1-propanamine
CAS 940201-31-0C18H21N3O
1-(4-(Dimethylamino)but-2-yn-1-yl)-3-(naphthalen-1-ylmethyl)urea
CAS 1396802-85-9C18H21N3O
![N-(1,2,3,4-Tetrahydronaphthalen-1-yl)-4,5,6,7-tetrahydro-1H-benzo[d]imidazole-5-carboxamide chemical structure, C18H21N3O, CAS 2034584-18-2](/s/RSWYINREZIUJFR-UHFFFAOYSA-N.svg)
N-(1,2,3,4-Tetrahydronaphthalen-1-yl)-4,5,6,7-tetrahydro-1H-benzo[d]imidazole-5-carboxamide
CAS 2034584-18-2C18H21N3O
11H-Dibenzo(b,e)(1,4)diazepin-11-one, 5,10-dihydro-10-(3-(dimethylamino)propyl)-
CAS 4231-96-3C18H21N3O
![N-[4-(Piperidin-1-ylmethyl)phenyl]pyridine-3-carboxamide chemical structure, C18H21N3O, CAS 637731-15-8](/s/LOGKBSJPIGTVFS-UHFFFAOYSA-N.svg)
N-[4-(Piperidin-1-ylmethyl)phenyl]pyridine-3-carboxamide
CAS 637731-15-8C18H21N3O
Pyrrolo(3,4-e)(1,4)diazepin-2(1H)-one, 3,7-dihydro-7-butyl-6-methyl-5-phenyl-
CAS 57435-94-6C18H21N3O
Pyrrolo(3,4-e)(1,4)diazepin-2(1H)-one, 3,7-dihydro-7-isobutyl-6-methyl-5-phenyl-
CAS 57435-95-7C18H21N3O
N-(4,6-Dimethylpyrimidin-2-yl)(phenylcyclopentyl)formamide
CAS 1023534-77-1C18H21N3O
![7-(5-Phenoxy-3-pyridyl)-1,7-diazaspiro[4,4]nonane chemical structure, C18H21N3O, CAS 646055-73-4](/s/NYXIDUKKGAMMGZ-UHFFFAOYSA-N.svg)
7-(5-Phenoxy-3-pyridyl)-1,7-diazaspiro[4,4]nonane
CAS 646055-73-4C18H21N3O
2-(Pyridin-3-yl)-N-(m-tolyl)piperidine-1-carboxamide
CAS 398996-02-6C18H21N3O
1-(3-(3,4-Dihydroisoquinolin-2(1H)-yl)azetidin-1-yl)-2-(1H-pyrrol-1-yl)ethanone
CAS 2034357-36-1C18H21N3O
2-Indolinone, 3-(2-aminoethyl)-1-(dimethylamino)-3-phenyl-
CAS 18176-31-3C18H21N3O
methanone chemical structure, C18H21N3O, CAS 444907-78-2](/s/AAGJYNRCFHTBJZ-UHFFFAOYSA-N.svg)
[4-(3-Methylbenzyl)piperazin-1-yl](pyridin-3-yl)methanone
CAS 444907-78-2C18H21N3O
(2,4-Dimethylphenyl)-(4-pyridin-2-ylpiperazin-1-yl)methanone
CAS 702648-79-1C18H21N3O
![(2E)-2-({[2-(1H-Indol-3-yl)ethyl]amino}methylidene)-4,4-dimethyl-3-oxopentanenitrile chemical structure, C18H21N3O, CAS 914636-36-5](/s/XUITWMKPRLPVGQ-SDNWHVSQSA-N.svg)
(2E)-2-({[2-(1H-Indol-3-yl)ethyl]amino}methylidene)-4,4-dimethyl-3-oxopentanenitrile
CAS 914636-36-5C18H21N3O
Pyrazino(1,2-a)(1,4)benzodiazepine, 1,2,3,4,4a,5-hexahydro-3,9-dimethyl-7-(2-furanyl)-
CAS 87566-39-0C18H21N3O
- (E)-N-Ethoxy-7-methyl-3-(4-methylphenyl)-7,8-dihydro-6H-cinnolin-5-imine1024823-08-2C18H21N3O
- (4E)-3-tert-Butyl-1-methyl-N-(prop-2-en-1-yloxy)-1H,4H-indeno[1,2-c]pyrazol-4-imine1025256-09-0C18H21N3O
- 1-([1,1'-Biphenyl]-2-yl)-3-(piperidin-4-yl)urea344436-13-1C18H21N3O
- 1-Benzyl-4-phenyl-piperazine-2-carboxamide135036-19-0C18H21N3O
- (E)-1-(4-((1H-Pyrazol-1-yl)methyl)piperidin-1-yl)-3-phenylprop-2-en-1-one1286744-28-2C18H21N3O
- (E)-1-(4-((1H-Imidazol-1-yl)methyl)piperidin-1-yl)-3-phenylprop-2-en-1-one1286744-54-4C18H21N3O
- 1-Benzhydryl-3-(methylamino)azetidine-3-carboxamide686344-70-7C18H21N3O
- 1-Isopropyl-N-[(1-methyl-1H-pyrrol-2-yl)methyl]-1H-indole-3-carboxamide1435991-12-0C18H21N3O
- N-((1-Methyl-4,5,6,7-tetrahydro-1H-indazol-3-yl)methyl)cinnamamide1448139-69-2C18H21N3O
- (E)-2-Methyl-3-phenyl-N-((4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-3-yl)methyl)acrylamide2035019-14-6C18H21N3O
- 3-Phenyl-1-{7,8,11-triazatricyclo[6.4.0.0^{2,6}]dodeca-1,6-dien-11-yl}propan-1-one2034413-90-4C18H21N3O
- (E)-1-(2-(1-Methyl-1H-pyrazol-4-yl)piperidin-1-yl)-3-phenylprop-2-en-1-one2034996-96-6C18H21N3O
- 3-(N-Methylanilino)-1-pyrrolidinecarboxanilide19481-74-4C18H21N3O
- 1-Ethyl-3-[2-(2-methylphenoxy)ethyl]benzimidazol-2-imine487015-09-8C18H21N3O
- N-[4-(Piperidin-1-ylmethyl)phenyl]pyridine-4-carboxamide830339-66-7C18H21N3O
- Diethyl{4-[(4-vinyloxyphenyl)diazenyl]phenyl}amine83300-45-2C18H21N3O
- N,4,11,11-tetramethyl-3,4-dihydro-1,4-methanophenazine-1(2H)-carboxamide622365-09-7C18H21N3O
- N'-[(E)-[4-(Dimethylamino)phenyl]methylidene]-3-phenylpropanehydrazide303211-69-0C18H21N3O
- 1-(1-Ethyl-2,5-dimethyl-1H-pyrrol-3-yl)-2-(2-methyl-1H-benzimidazol-1-yl)ethanone948269-00-9C18H21N3O
- (4-Amino-3-methylphenyl)(4-phenyl-1-piperazinyl)methanone1016760-56-7C18H21N3O
- 2-[4-(2-Ethyl-5,7-dimethyl-3H-imidazo[4,5-b]pyridin-3-yl)phenyl]ethanol415907-60-7C18H21N3O
- N-(1-Cyano-1,2-dimethylpropyl)-2-[(naphthalen-2-yl)amino]acetamide1240811-16-8C18H21N3O
- N-(2-Cyanoethyl)-2-[(2,3-dihydro-1H-inden-1-yl)(prop-2-yn-1-yl)amino]-N-methylacetamide1241217-75-3C18H21N3O
- N-(1-Cyanobutyl)-2,3,4,9-tetrahydro-1H-carbazole-6-carboxamide1241184-26-8C18H21N3O
- N-(2-Methyl-1H-indol-5-yl)-1-(prop-2-yn-1-yl)piperidine-2-carboxamide1280785-03-6C18H21N3O
- N-(2-Methyl-1H-indol-5-yl)-1-(prop-2-yn-1-yl)piperidine-4-carboxamide1311523-00-8C18H21N3O
- Methanone, [5-(1,1-dimethylethyl)-2,3-dihydro-1H-indol-1-yl](5-methyl-2-pyrazinyl)-1311676-04-6C18H21N3O
- 6-[5-(1-Amino-1-methyl-ethyl)-pyridin-3-yl]-1-methyl-3,4-dihydro-1H-quinolin-2-one1427585-35-0C18H21N3O
- N-[2-(3,5-Dicyclopropyl-1H-pyrazol-1-yl)ethyl]benzamide1797225-95-6C18H21N3O
- 1-(7,8-Dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)-3-(3,4-dimethylphenyl)propan-1-one1797636-93-1C18H21N3O
- (4-(tert-Butyl)phenyl)(7,8-dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)methanone1797322-07-6C18H21N3O
- 3-Phenyl-N-[1-(pyridin-2-yl)pyrrolidin-3-yl]propanamide1795417-48-9C18H21N3O
- N-(1-(Pyridin-2-yl)pyrrolidin-3-yl)-2-(m-tolyl)acetamide1795458-19-3C18H21N3O
- N-((1-(Pyridin-4-yl)piperidin-4-yl)methyl)benzamide2034507-50-9C18H21N3O
- (2-Methyl-4,5,6,7-tetrahydro-1H-benzo[d]imidazol-5-yl)(2-methylindolin-1-yl)methanone2034441-30-8C18H21N3O
- 2-(3-Methylphenyl)-1-{7,8,11-triazatricyclo[6.4.0.0^{2,6}]dodeca-1,6-dien-11-yl}ethan-1-one2034289-71-7C18H21N3O
- N-(2-(4-Phenyl-1H-pyrazol-1-yl)ethyl)cyclohex-3-enecarboxamide2034326-09-3C18H21N3O
- 1-(2-Cyclopropyl-6,7-dihydropyrazolo[1,5-a]pyrazin-5(4H)-yl)-3-phenylpropan-1-one2034326-65-1C18H21N3O
- 1-(2-Cyclopropyl-6,7-dihydropyrazolo[1,5-a]pyrazin-5(4H)-yl)-2-(m-tolyl)ethanone2034278-43-6C18H21N3O
- (3-(1H-Benzo[d]imidazol-1-yl)pyrrolidin-1-yl)(cyclohex-3-en-1-yl)methanone2034383-63-4C18H21N3O
- Cyclobutyl(4-(1-methyl-1H-pyrazol-4-yl)-3,4-dihydroisoquinolin-2(1H)-yl)methanone2309555-36-8C18H21N3O
- 5,5-Dimethyl-3-[(5-methyl-2-phenylpyrazol-3-yl)amino]cyclohex-2-en-1-one2034155-52-5C18H21N3O
- 1-Benzyl-N-(cyanomethyl)-N-(prop-2-yn-1-yl)piperidine-3-carboxamide1825672-55-6C18H21N3O
- N-[(1-Benzyl-1H-pyrazol-4-yl)methyl]-N-(propan-2-yl)but-2-ynamide2094236-04-9C18H21N3O
- N-(2-(5,6,7,8-Tetrahydroimidazo[1,2-a]pyridin-2-yl)phenyl)cyclobutanecarboxamide2034463-53-9C18H21N3O
- 3-[(5-Cyclopropylpyridin-3-yl)methyl]-1-(2-phenylethyl)urea2034313-19-2C18H21N3O
- 1-((5-Cyclopropylpyridin-3-yl)methyl)-3-(3,4-dimethylphenyl)urea2034570-97-1C18H21N3O
- 2-(((4-(4-Methylphenyl)-1-piperazinyl)imino)methyl)phenol1351284-61-1C18H21N3O
- 7-Mesityl-2,5,6-trimethyl-3H-pyrrolo[2,3-d]pyrimidin-4(7H)-one157286-65-2C18H21N3O
- Propanamide, 2-methyl-N-[2-methyl-4-[(2-methylphenyl)azo]phenyl]-860086-78-8C18H21N3O
- Urea, N-(9-ethyl-9H-carbazol-3-yl)-N'-(1-methylethyl)-289498-53-9C18H21N3O
- N,N-Diphenyl-N'-piperidin-1-ylurea39175-39-8C18H21N3O
- N-(1-Cyano-1,2-dimethylpropyl)-2-[(naphthalen-1-yl)amino]acetamide923760-77-4C18H21N3O
- 1-(Phenylmethyl)-N-4-pyridinyl-4-piperidinecarboxamide110105-43-6C18H21N3O
- N-(1-Cyanocyclobutyl)-4-(1H-indol-3-yl)-N-methylbutanamide1258757-63-9C18H21N3O
- N-(1-Cyanocyclobutyl)-2-(2,5-dimethyl-1H-indol-3-yl)-N-methylacetamide1355730-24-3C18H21N3O
- 1-Benzyl-4-(pyridin-3-yl)piperidine-4-carboxamide199439-90-2C18H21N3O
- 1-Benzyl-4-(pyridin-4-yl)piperidine-4-carboxamide214849-10-2C18H21N3O
- 1H-Benzimidazole-2-methanamine, N-[[2-(1-methylethoxy)phenyl]methyl]-1259063-27-8C18H21N3O
- 1-Phenyl-3-(3-(piperidin-3-yl)phenyl)urea1271808-77-5C18H21N3O
- [3-(5-Amino-3-t-butyl-pyrazol-1-yl)naphthalen-1-yl]methanol897373-75-0C18H21N3O
- N,N-Diethyl-2-{[5-(phenylethynyl)pyrimidin-2-yl]oxy}ethan-1-amine87148-56-9C18H21N3O
- 2-Amino-N-((9-ethyl-9H-carbazol-3-yl)methyl)propanamide1427185-34-9C18H21N3O
- N-[2-(2-Phenylpyrimidin-5-yl)ethyl]cyclopentanecarboxamide2034396-92-2C18H21N3O
- (Z)-2-Cyano-N-cyclopropyl-3-(4-piperidin-1-ylphenyl)prop-2-enamide1012978-28-7C18H21N3O
- (Z)-2-Cyano-N-(1-cyclopropylpiperidin-4-yl)-3-phenylprop-2-enamide1147764-72-4C18H21N3O
- N-(1-Cyanocyclopentyl)-3-(1H-indol-3-yl)butanamide1808486-47-6C18H21N3O
- N-[(5-Cyclopropylpyridin-3-yl)methyl]-3-(dimethylamino)benzamide2034232-80-7C18H21N3O
- 1-{2-[4-(4-Methylphenyl)-1H-imidazol-2-yl]piperidin-1-yl}prop-2-en-1-one2094680-24-5C18H21N3O
- 3-[(6-Cyclopropylpyridin-3-yl)methyl]-1-(2-phenylethyl)urea2097922-80-8C18H21N3O
- 2-[(1-Benzylazetidin-3-yl)methyl]-2H,3H,5H,6H,7H-cyclopenta[c]pyridazin-3-one2198234-32-9C18H21N3O
- N-(1-Cyanocyclohexyl)-3,5-dimethyl-1H-indole-2-carboxamide2129282-31-9C18H21N3O
- N-(1-Cyanocyclohexyl)-4,5-dimethyl-1H-indole-2-carboxamide2127639-99-8C18H21N3O
- N-(1-Cyanocyclohexyl)-2,3-dimethyl-1H-indole-5-carboxamide2133695-98-2C18H21N3O
- N-(1-Cyanocyclohexyl)-1-ethylindole-3-carboxamide2191487-61-1C18H21N3O
- (2E)-1-[3-(1-Methyl-1H-pyrazol-4-yl)piperidin-1-yl]-3-phenylprop-2-en-1-one2321334-31-8C18H21N3O
Frequently asked questions
What is the molar mass of C18H21N3O?
The molar mass of C18H21N3O is 295.39 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 1 oxygen atom. The monoisotopic mass is 295.1685 Da.
How many compounds have the formula C18H21N3O?
CompoundList lists 285 compounds with the molecular formula C18H21N3O, including Carbanilide, N-(1-methyl-3-pyrrolidinyl)-, (2,5-Dimethylphenyl)-(4-pyridin-2-ylpiperazin-1-yl)methanone, 6H-Pyrrolo(3,4-d)pyrimidin-2(1H)-one, 1,6-diethyl-4,5-dimethyl-7-phenyl-. 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 C18H21N3O?
C18H21N3O has a degree of unsaturation of 10. 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.