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 201 to 285 of 285 compounds
![(2E)-1-[2-(1-Methyl-1H-pyrazol-5-yl)piperidin-1-yl]-3-phenylprop-2-en-1-one chemical structure, C18H21N3O, CAS 2321333-27-9](/s/CLGSSUHDNBDGCS-ZHACJKMWSA-N.svg)
(2E)-1-[2-(1-Methyl-1H-pyrazol-5-yl)piperidin-1-yl]-3-phenylprop-2-en-1-one
CAS 2321333-27-9C18H21N3O
N-(1-Cyano-3-methylcyclohexyl)-1-methylindole-3-carboxamide
CAS 2127303-27-7C18H21N3O
![(E)-4-(Dimethylamino)-N-[(2-phenylpyridin-4-yl)methyl]but-2-enamide chemical structure, C18H21N3O, CAS 2411322-36-4](/s/FMZOBRCBSKQNOI-RMKNXTFCSA-N.svg)
(E)-4-(Dimethylamino)-N-[(2-phenylpyridin-4-yl)methyl]but-2-enamide
CAS 2411322-36-4C18H21N3O
![(E)-4-(Dimethylamino)-N-[(3-pyridin-4-ylphenyl)methyl]but-2-enamide chemical structure, C18H21N3O, CAS 2411331-91-2](/s/AGBZZRXDADLAAI-QPJJXVBHSA-N.svg)
(E)-4-(Dimethylamino)-N-[(3-pyridin-4-ylphenyl)methyl]but-2-enamide
CAS 2411331-91-2C18H21N3O
![1-{[1-(1,2,3,4-Tetrahydronaphthalene-1-carbonyl)azetidin-3-yl]methyl}-1H-imidazole chemical structure, C18H21N3O, CAS 2549017-85-6](/s/SNAAMDOWQUDKAF-UHFFFAOYSA-N.svg)
1-{[1-(1,2,3,4-Tetrahydronaphthalene-1-carbonyl)azetidin-3-yl]methyl}-1H-imidazole
CAS 2549017-85-6C18H21N3O
![4-[[2-(5,8-Dihydronaphthalen-1-yloxymethyl)aziridin-1-yl]methyl]-1-methylpyrazole chemical structure, C18H21N3O, CAS 2411298-67-2](/s/KTDGVYRFFJSOOA-UHFFFAOYSA-N.svg)
4-[[2-(5,8-Dihydronaphthalen-1-yloxymethyl)aziridin-1-yl]methyl]-1-methylpyrazole
CAS 2411298-67-2C18H21N3O
2-(1-Cyclobutanecarbonylpiperidin-4-yl)-1,8-naphthyridine
CAS 2640889-47-8C18H21N3O
![2-(1,5-Dimethyl-1H-pyrazole-3-carbonyl)-6-phenyl-2-azaspiro[3.3]heptane chemical structure, C18H21N3O, CAS 2640963-69-3](/s/BTSDFQHOJXSISI-UHFFFAOYSA-N.svg)
2-(1,5-Dimethyl-1H-pyrazole-3-carbonyl)-6-phenyl-2-azaspiro[3.3]heptane
CAS 2640963-69-3C18H21N3O
![Butanamide, 2-ethyl-N-[4-(2-phenyldiazenyl)phenyl]- chemical structure, C18H21N3O, CAS 544459-46-3](/s/ZNROODPFNIOHOB-UHFFFAOYSA-N.svg)
Butanamide, 2-ethyl-N-[4-(2-phenyldiazenyl)phenyl]-
CAS 544459-46-3C18H21N3O
![Hexanamide, N-[4-(2-phenyldiazenyl)phenyl]- chemical structure, C18H21N3O, CAS 109535-76-4](/s/DJHJFQYPVLLBEO-UHFFFAOYSA-N.svg)
Hexanamide, N-[4-(2-phenyldiazenyl)phenyl]-
CAS 109535-76-4C18H21N3O
![N-[(E)-(4-Methoxyphenyl)methylidene]-4-phenyl-1-piperazinamine chemical structure, C18H21N3O, CAS 80401-79-2](/s/OGSGMPCTCSELMI-XDJHFCHBSA-N.svg)
N-[(E)-(4-Methoxyphenyl)methylidene]-4-phenyl-1-piperazinamine
CAS 80401-79-2C18H21N3O
![Benzamide, N-[(butylamino)(phenylamino)methylene]- chemical structure, C18H21N3O, CAS 410090-89-0](/s/WCDWPUYHAYYNRO-UHFFFAOYSA-N.svg)
Benzamide, N-[(butylamino)(phenylamino)methylene]-
CAS 410090-89-0C18H21N3O
![2-(5-Phenoxypyridin-3-yl)-2,7-diazaspiro[4.4]nonane chemical structure, C18H21N3O, CAS 646056-54-4](/s/RUBIFXSCTMTDCJ-UHFFFAOYSA-N.svg)
2-(5-Phenoxypyridin-3-yl)-2,7-diazaspiro[4.4]nonane
CAS 646056-54-4C18H21N3O
2-(Cyclohexylamino)-N-phenyl-3-pyridinecarboxamide
CAS 56149-27-0C18H21N3O
6-(1-Methylethyl)-2-(4-morpholinyl)-3-quinolineacetonitrile
CAS 1017360-65-4C18H21N3O
![1,2-Dihydro-2-[1-(phenylmethyl)-4-piperidinyl]-3H-pyrrolo[1,2-c]imidazol-3-one chemical structure, C18H21N3O, CAS 1224698-13-8](/s/DLJWUBBWCIFRRT-UHFFFAOYSA-N.svg)
1,2-Dihydro-2-[1-(phenylmethyl)-4-piperidinyl]-3H-pyrrolo[1,2-c]imidazol-3-one
CAS 1224698-13-8C18H21N3O
N-(1-Methyl-4-piperidinyl)-6-phenyl-3-pyridinecarboxamide
CAS 1033844-84-6C18H21N3O
(2-(1-Isobutyl-1H-indazol-5-yloxy)phenyl)methanamine
CAS 1361543-77-2C18H21N3O
![10-(2-(Diethylamino)ethyl)benzo[b][1,8]naphthyridin-5(10H)-one chemical structure, C18H21N3O, CAS 160781-59-9](/s/UNHDSFGPNRANBD-UHFFFAOYSA-N.svg)
10-(2-(Diethylamino)ethyl)benzo[b][1,8]naphthyridin-5(10H)-one
CAS 160781-59-9C18H21N3O
![N,N-Diethyl-2-{[4-(phenylethynyl)pyrimidin-2-yl]oxy}ethan-1-amine chemical structure, C18H21N3O, CAS 87148-59-2](/s/ZEHKPJMEUCLPGX-UHFFFAOYSA-N.svg)
N,N-Diethyl-2-{[4-(phenylethynyl)pyrimidin-2-yl]oxy}ethan-1-amine
CAS 87148-59-2C18H21N3O
![N,N-Diethyl-2-{[6-(phenylethynyl)pyridazin-3-yl]oxy}ethan-1-amine chemical structure, C18H21N3O, CAS 87148-54-7](/s/QNELCNOVQXFGGQ-UHFFFAOYSA-N.svg)
N,N-Diethyl-2-{[6-(phenylethynyl)pyridazin-3-yl]oxy}ethan-1-amine
CAS 87148-54-7C18H21N3O
![4-[5-(Adamantan-1-yl)-1,2,4-oxadiazol-3-yl]aniline chemical structure, C18H21N3O, CAS 96898-80-5](/s/VNZKYLMKTPIMNF-UHFFFAOYSA-N.svg)
4-[5-(Adamantan-1-yl)-1,2,4-oxadiazol-3-yl]aniline
CAS 96898-80-5C18H21N3O
![(4'-Amino[1,1'-biphenyl]-4-yl)(4-methylpiperazin-1-yl)methanone chemical structure, C18H21N3O, CAS 1335042-64-2](/s/XYFNDFXNFSVPDS-UHFFFAOYSA-N.svg)
(4'-Amino[1,1'-biphenyl]-4-yl)(4-methylpiperazin-1-yl)methanone
CAS 1335042-64-2C18H21N3O
6-(4-Methoxy-2,5-dimethylphenyl)-2-(propylamino)pyridine-3-carbonitrile
CAS 1284559-82-5C18H21N3O
- 2-(3-(Benzyloxy)cyclobutyl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine2087477-99-2C18H21N3O
- N-[(6-Cyclopropylpyridin-3-yl)methyl]-3-(dimethylamino)benzamide2097915-43-8C18H21N3O
- 1-[3-(2-Cyclopropyl-1H-1,3-benzodiazol-1-yl)azetidin-1-yl]pent-4-en-1-one2379983-86-3C18H21N3O
- 1-[1-(Cyclohex-3-ene-1-carbonyl)azetidin-3-yl]-2-methyl-1H-1,3-benzodiazole2380098-30-4C18H21N3O
- N-[1-Cyclopropyl-2-(5,6-dimethylbenzimidazol-1-yl)ethyl]but-2-ynamide2411239-37-5C18H21N3O
- 2-Cyano-3-(1,2-dimethyl-1H-indol-3-yl)-N,N-diethyl-2-propenamide886766-62-7C18H21N3O
- 4-Methyl-2-[3-(pyrrolidine-1-carbonyl)azetidin-1-yl]quinoline2877764-29-7C18H21N3O
- N-Cyclopropyl-1-(quinolin-2-yl)piperidine-3-carboxamide2818184-48-2C18H21N3O
- 2-(4-Cyclopropanecarbonyl-1,4-diazepan-1-yl)quinoline2877718-13-1C18H21N3O
- 4-(4-Cyclopropanecarbonyl-1,4-diazepan-1-yl)quinoline2877633-53-7C18H21N3O
- 4-[3-(Pyrrolidine-1-carbonyl)pyrrolidin-1-yl]quinoline2877631-70-2C18H21N3O
- 1-[4-(4-Aminophenyl)piperazin-1-yl]-2-phenylethanone381208-35-1C18H21N3O
- (4-Aminophenyl)[4-(4-methylphenyl)piperazin-1-yl]methanone79834-43-8C18H21N3O
- 4-[4-(Piperazin-1-ylmethyl)phenyl]benzamide1125434-41-4C18H21N3O
- 2-Butyl-5-(pyridin-3-ylmethylamino)-3H-isoindol-1-one1338467-54-1C18H21N3O
- 2-Buten-1-one,3-methyl-1-(5,6,7,8-tetrahydro-7-methyl-3-phenylimidazo[1,5-a]pyrazin-1-yl)-1094088-27-3C18H21N3O
- 1H-Pyrrolo[2,3-c]pyridin-7-amine,1-(2-methoxyethyl)-2-methyl-N-(phenylmethyl)-874014-60-5C18H21N3O
- 1-[2-(Benzyloxy)ethyl]-5-phenyl-4,5-dihydro-1H-imidazol-2-amine89145-80-2C18H21N3O
- 1-{4-[(E)-(4-Methoxyphenyl)diazenyl]phenyl}piperidine89505-27-1C18H21N3O
- (3E)-3-{[4-(Dimethylamino)phenyl]imino}-N-phenylbutanamide24572-54-1C18H21N3O
- N-[Phenyl(piperidin-1-yl)methyl]pyridine-4-carboxamide474901-07-0C18H21N3O
- 2-{2-[(Diphenylmethyl)amino]-4,5-dihydro-1H-imidazol-1-yl}ethan-1-ol63406-52-0C18H21N3O
- N-{[4-(4-Methylpiperazin-1-yl)phenyl](phenyl)methylidene}hydroxylamine831226-50-7C18H21N3O
- 4-[(8-Azabicyclo[3.2.1]octan-3-ylidene)(cyano)methyl]-N-ethylbenzamide823812-11-9C18H21N3O
- Alcaftadine Methylhydroxy-N-demethylated147582-55-6C18H21N3O
- (2R)-N,N-Diethyl-2-phenyl-2H,3H-imidazo[1,2-a]pyridine-6-carboxamide872201-01-9C18H21N3O
- (2-(6-(Methylamino)pyridin-3-yl)piperidin-1-yl)(phenyl)methanone1352516-73-4C18H21N3O
- 2-(6-(Methyl(phenyl)amino)pyridin-3-yl)piperidine-1-carbaldehyde1352501-27-9C18H21N3O
- 2-(2-(Methyl(phenyl)amino)pyridin-3-yl)piperidine-1-carbaldehyde1352493-49-2C18H21N3O
- (2-(2-Methyl-6-(methylamino)pyridin-3-yl)pyrrolidin-1-yl)(phenyl)methanone1352539-37-7C18H21N3O
- (5-Methyl-6-(4-methylpiperazin-1-yl)pyridin-3-yl)(phenyl)methanone1355188-60-1C18H21N3O
- (2-Methyl-6-(4-methylpiperazin-1-yl)pyridin-3-yl)(phenyl)methanone1355230-14-6C18H21N3O
- (6-(4-Ethylpiperazin-1-yl)pyridin-3-yl)(phenyl)methanone1355222-53-5C18H21N3O
- N-(2,4,6-Trimethylphenyl)-5,6,7,8-tetrahydroquinazoline-4-carboxamide2415470-71-0C18H21N3O
- 2-Cyclopropyl-1-[4-(1,8-naphthyridin-2-yl)piperidin-1-yl]ethan-1-one2640903-51-9C18H21N3O
- N-[1-(Quinolin-2-yl)piperidin-3-yl]cyclopropanecarboxamide2742013-31-4C18H21N3O
- 1-[4-(1,8-Naphthyridin-2-yl)piperidin-1-yl]pent-4-en-1-one2640969-00-0C18H21N3O
- 2-Cyclopropyl-6-(oxan-4-yl)-N-phenylpyrimidin-4-amine2640946-88-7C18H21N3O
- 1-[4-(6-Cyclopropyl-1,8-naphthyridin-2-yl)piperidin-1-yl]ethan-1-one2741935-30-6C18H21N3O
- 1-[(3,5-Dimethyl-1,2-oxazol-4-yl)methyl]-4-phenylpiperidine-4-carbonitrile2742040-27-1C18H21N3O
- N-Cyclopropyl-1-(quinolin-4-yl)piperidine-4-carboxamide2374074-70-9C18H21N3O
- N-[1-(Quinolin-4-yl)piperidin-3-yl]cyclopropanecarboxamide2742057-45-8C18H21N3O
- 2-Cyclopentyl-1-{6H,7H,8H,9H-pyrido[2,3-b]1,6-naphthyridin-7-yl}ethan-1-one2741941-11-5C18H21N3O
- N-Cyclopropyl-1-(quinolin-2-yl)piperidine-4-carboxamide2373797-77-2C18H21N3O
- N-Cyclopropyl-1-(isoquinolin-1-yl)piperidine-4-carboxamide2741919-13-9C18H21N3O
- N-[1-(Quinolin-2-yl)piperidin-4-yl]cyclopropanecarboxamide2770637-77-7C18H21N3O
- N-[1-(Quinolin-4-yl)piperidin-4-yl]cyclopropanecarboxamide2374074-48-1C18H21N3O
- 5-(1-Cyclohexyl-1H-pyrazol-4-yl)-2-methoxy-3-methylbenzonitrile3078569-30-6C18H21N3O
- (6-Amino-[1,1'-biphenyl]-2-yl)(4-methylpiperazin-1-yl)methanone3078555-10-6C18H21N3O
- 1-(6-Methylpyrimidin-4-yl)-3,4-dihydrospiro[1-benzopyran-2,4-piperidine]3054602-60-4C18H21N3O
- 4-[3-(Piperidine-1-carbonyl)azetidin-1-yl]quinoline3054638-21-7C18H21N3O
- 2-[3-(Piperidine-1-carbonyl)azetidin-1-yl]quinoline3054535-36-0C18H21N3O
- N-Benzyl-2-(piperazin-1-yl)benzamide1018544-01-8C18H21N3O
- N-Nitroso fentanyl EP impurity J1184873-13-9C18H21N3O
- Ethanone,1-(2,3-dihydro-1H-indol-5-yl)-2-[methyl[2-(4-pyridinyl)ethyl]amino]-1225688-65-2C18H21N3O
- 3,6-Bis(dimethylamino)-10-methylacridin-9(10H)-one98259-05-3C18H21N3O
- 1-Benzylspiro[4,6-dihydroindazole-5,4'-piperidine]-7-one1332366-98-9C18H21N3O
- 4,4-Dimethyl-5-phenyl-2-((pyridin-2-ylamino)methyl)-3,4-dihydro-2H-pyrrole 1-oxide1996632-77-9C18H21N3O
- 4,4-Dimethyl-2-((phenylamino)methyl)-5-(pyridin-2-yl)-3,4-dihydro-2H-pyrrole 1-oxide1996632-62-2C18H21N3O
- 8-(2-(Pyrrolidin-1-yl)phenyl)-5,6,7,8-tetrahydro-1,7-naphthyridin-2(1H)-one2617227-44-6C18H21N3O
- 2-((S)-4-((S)-sec-Butyl)-4,5-dihydrooxazol-2-yl)-N-phenylpyridin-3-amine2865165-97-3C18H21N3O
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 (2E)-1-[2-(1-Methyl-1H-pyrazol-5-yl)piperidin-1-yl]-3-phenylprop-2-en-1-one, N-(1-Cyano-3-methylcyclohexyl)-1-methylindole-3-carboxamide, (E)-4-(Dimethylamino)-N-[(2-phenylpyridin-4-yl)methyl]but-2-enamide. 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.