Molecular formula
C18H21N3O2
434 compounds have this formula on CompoundList.
- Molar mass
- 311.38g/mol
- Monoisotopic mass
- 311.1634Da
- Atoms
- 44
- Elements
- 4
- Rings plus double bonds
- 10
The formula C18H21N3O2 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 2 oxygen 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 × 1869.43%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 216.80%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 313.49%14.007 × 3 = 42.021 g/mol
- O Oxygen × 210.28%15.999 × 2 = 31.998 g/mol
Look up another formula
Compounds with the formula C18H21N3O2
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 434 compounds
Ethyl 2-phenyl-4-(1-piperidinyl)-5-pyrimidinecarboxylate
CAS 34753-22-5C18H21N3O2
![(2-Methoxyphenyl)-[4-(pyridin-3-ylmethyl)piperazin-1-yl]methanone chemical structure, C18H21N3O2, CAS 423744-05-2](/s/VFGQTALCPPSTLM-UHFFFAOYSA-N.svg)
(2-Methoxyphenyl)-[4-(pyridin-3-ylmethyl)piperazin-1-yl]methanone
CAS 423744-05-2C18H21N3O2
Methyl 6-(4-benzylpiperazino)nicotinate
CAS 132521-74-5C18H21N3O2
![(4-Methoxyphenyl)-[4-(pyridin-3-ylmethyl)piperazin-1-yl]methanone chemical structure, C18H21N3O2, CAS 355813-67-1](/s/SBFFCEDNDCYRAB-UHFFFAOYSA-N.svg)
(4-Methoxyphenyl)-[4-(pyridin-3-ylmethyl)piperazin-1-yl]methanone
CAS 355813-67-1C18H21N3O2
methanone chemical structure, C18H21N3O2, CAS 355814-19-6](/s/VSXWYYGXHLALRA-UHFFFAOYSA-N.svg)
[4-(2-Methoxybenzyl)piperazin-1-yl](pyridin-3-yl)methanone
CAS 355814-19-6C18H21N3O2
![[4-[(4-Methoxyphenyl)methyl]piperazin-1-yl]-pyridin-4-ylmethanone chemical structure, C18H21N3O2, CAS 355814-37-8](/s/SLAJKKOTYDPXIY-UHFFFAOYSA-N.svg)
[4-[(4-Methoxyphenyl)methyl]piperazin-1-yl]-pyridin-4-ylmethanone
CAS 355814-37-8C18H21N3O2
![(4-Aminophenyl)[4-(2-methoxyphenyl)piperazino]methanone chemical structure, C18H21N3O2, CAS 302333-22-8](/s/LNWURGYRESTCAD-UHFFFAOYSA-N.svg)
(4-Aminophenyl)[4-(2-methoxyphenyl)piperazino]methanone
CAS 302333-22-8C18H21N3O2
2-(2-Isopropyl-5-methylphenoxy)-N'-(4-pyridinylmethylene)acetohydrazide
CAS 298190-49-5C18H21N3O2
![2-(Benzoylamino)-N-[2-(dimethylamino)ethyl]benzamide chemical structure, C18H21N3O2, CAS 947912-69-8](/s/VYWFJPCAPRBKLO-UHFFFAOYSA-N.svg)
2-(Benzoylamino)-N-[2-(dimethylamino)ethyl]benzamide
CAS 947912-69-8C18H21N3O2
![(3-Methoxyphenyl)-[4-(pyridin-3-ylmethyl)piperazin-1-yl]methanone chemical structure, C18H21N3O2, CAS 355815-17-7](/s/LSMUOJYMXMFJSK-UHFFFAOYSA-N.svg)
(3-Methoxyphenyl)-[4-(pyridin-3-ylmethyl)piperazin-1-yl]methanone
CAS 355815-17-7C18H21N3O2
![4-(tert-Butyl)-N-[4-(hydrazinocarbonyl)phenyl]-benzamide chemical structure, C18H21N3O2, CAS 462068-82-2](/s/MCXFZWBARWOLHW-UHFFFAOYSA-N.svg)
4-(tert-Butyl)-N-[4-(hydrazinocarbonyl)phenyl]-benzamide
CAS 462068-82-2C18H21N3O2
![5(6H)-Quinazolinone, 7,8-dihydro-2-[[(4-methoxyphenyl)methyl]amino]-7,7-dimethyl- chemical structure, C18H21N3O2, CAS 669749-82-0](/s/UTLFKIITHRBUAD-UHFFFAOYSA-N.svg)
5(6H)-Quinazolinone, 7,8-dihydro-2-[[(4-methoxyphenyl)methyl]amino]-7,7-dimethyl-
CAS 669749-82-0C18H21N3O2
![4-[(Anilinocarbonyl)amino]-N-butylbenzamide chemical structure, C18H21N3O2, CAS 940203-98-5](/s/GWNYBBWHBXFENZ-UHFFFAOYSA-N.svg)
4-[(Anilinocarbonyl)amino]-N-butylbenzamide
CAS 940203-98-5C18H21N3O2
![3-[(Anilinocarbonyl)amino]-N-butylbenzamide chemical structure, C18H21N3O2, CAS 940488-77-7](/s/XIQCGIKQQZLFNV-UHFFFAOYSA-N.svg)
3-[(Anilinocarbonyl)amino]-N-butylbenzamide
CAS 940488-77-7C18H21N3O2
N-(3-(3,4-Dihydroisoquinolin-2(1H)-yl)-2-hydroxypropyl)picolinamide
CAS 1616246-04-8C18H21N3O2
2-(3-Methylphenoxy)-1-(4-pyridin-2-ylpiperazin-1-yl)ethanone
CAS 351418-78-5C18H21N3O2
![6-tert-Butyl-1,3-dimethyl-5-phenyl-1H-pyrrolo[3,4-d]pyrimidine-2,4(3H,6H)-dione chemical structure, C18H21N3O2, CAS 664970-91-6](/s/FZLMXVFXHFUFTR-UHFFFAOYSA-N.svg)
6-tert-Butyl-1,3-dimethyl-5-phenyl-1H-pyrrolo[3,4-d]pyrimidine-2,4(3H,6H)-dione
CAS 664970-91-6C18H21N3O2
![2-Phenoxy-1-[4-(pyridin-3-ylmethyl)piperazin-1-yl]ethanone chemical structure, C18H21N3O2, CAS 333780-28-2](/s/SAYWUUGRJYOFCW-UHFFFAOYSA-N.svg)
2-Phenoxy-1-[4-(pyridin-3-ylmethyl)piperazin-1-yl]ethanone
CAS 333780-28-2C18H21N3O2
![[4-[(3-Methoxyphenyl)methyl]piperazin-1-yl]-pyridin-4-ylmethanone chemical structure, C18H21N3O2, CAS 354536-08-6](/s/XXQSAPDRNQQJEO-UHFFFAOYSA-N.svg)
[4-[(3-Methoxyphenyl)methyl]piperazin-1-yl]-pyridin-4-ylmethanone
CAS 354536-08-6C18H21N3O2
2-(4-tert-Butylphenyl)-5-morpholin-4-yl-1,3-oxazole-4-carbonitrile
CAS 710989-20-1C18H21N3O2
2-Nitro-N-(2-phenylethyl)-5-(pyrrolidin-1-yl)aniline
CAS 330177-47-4C18H21N3O2
![N-[3-(1-Propyl-1H-benzimidazol-2-yl)propyl]furan-2-carboxamide chemical structure, C18H21N3O2, CAS 890637-07-7](/s/IYLGWBMUVUAGJE-UHFFFAOYSA-N.svg)
N-[3-(1-Propyl-1H-benzimidazol-2-yl)propyl]furan-2-carboxamide
CAS 890637-07-7C18H21N3O2
7-(Furan-2-yl)-4-methyl-2-(piperidin-1-yl)-7,8-dihydroquinazolin-5(6H)-one
CAS 919737-58-9C18H21N3O2
5H-Dibenzo(b,e)(1,4)diazepin-11-one, 10,11-dihydro-10-(2-(dimethylamino)ethyl)-3-methoxy-
CAS 3910-27-8C18H21N3O2
- 5-(3-(Dimethylamino)propyl)-5-oxo-5H-5lambda~5~-dibenzo(b,e)(1,4)diazepin-11-ol2137-27-1C18H21N3O2
- 2-Phenoxy-1-[4-(pyridin-4-ylmethyl)piperazin-1-yl]ethanone355392-74-4C18H21N3O2
- N-(6-Methylpyridin-2-yl)-4-(pentanoylamino)benzamide663184-70-1C18H21N3O2
- 1H-Pyrrolo(2,3-d)pyrimidine-2,4(3H,7H)-dione, 5-butyl-1,3-dimethyl-6-phenyl-53681-32-6C18H21N3O2
- 4-(4-Benzylpiperidin-1-yl)-6-methoxypyrimidine-5-carbaldehyde861207-96-7C18H21N3O2
- N-(3-Ethoxy-4-methoxybenzyl)-2-methyl-1H-benzo[d]imidazol-4-amine889965-52-0C18H21N3O2
- 4-Cyclopentyloxy-N-[(E)-(1-methylpyrrol-2-yl)methylideneamino]benzamide445246-76-4C18H21N3O2
- 2-[(4-Methoxyphenyl)amino]-4,7,7-trimethyl-7,8-dihydroquinazolin-5(6H)-one925023-72-9C18H21N3O2
- 4-[(Anilinocarbonyl)amino]-N,N-diethylbenzamide940532-00-3C18H21N3O2
- 4-[(Anilinocarbonyl)amino]-N-(sec-butyl)benzamide941858-86-2C18H21N3O2
- 1-Boc-4-cyano-4-(2-cyanophenyl)-piperidine268205-02-3C18H21N3O2
- 3-(2-(2-Methylindolin-1-yl)-2-oxoethyl)-6-propylpyrimidin-4(3H)-one1209938-16-8C18H21N3O2
- Phenyl ((1-(pyridin-2-yl)piperidin-4-yl)methyl)carbamate1235646-56-6C18H21N3O2
- N-(2-Hydroxy-2,3-dihydro-1H-inden-1-yl)-2-methyl-4,5,6,7-tetrahydro-1H-benzo[d]imidazole-5-carboxamide2034254-05-0C18H21N3O2
- 3-(1-(5-Ethylpyrimidin-2-yl)piperidin-4-yl)benzoic acid1956364-13-8C18H21N3O2
- 2-Phenyl-7,8-dihydro-6H-pyrido[3,2-d]pyrimidine-5-carboxylic acid tert-butyl ester1421312-01-7C18H21N3O2
- Acetamide, N-[3-[[4-(diethylamino)phenyl]imino]-6-oxo-1,4-cyclohexadien-1-yl]-5991-91-3C18H21N3O2
- 4-[3-(Dimethylamino)-2-phenylacryloyl]-N,N-dimethyl-1H-pyrrole-2-carboxamide338403-38-6C18H21N3O2
- 5-Morpholin-4-yl-8,9,10,11-tetrahydroazepino[1,2-a]quinazoline-7-carbaldehyde379727-05-6C18H21N3O2
- N-Benzyl-2-nitro-5-(piperidin-1-yl)aniline346704-06-1C18H21N3O2
- 1H-Pyrrolo(2,3-d)pyrimidine-2,4(3H,7H)-dione, 5-butyl-3,6-dimethyl-1-phenyl-53681-37-1C18H21N3O2
- Piperazine, 1-(o-methoxyphenyl)-4-nicotinoylmethyl-58013-14-2C18H21N3O2
- Pentanoic acid, 5-oxo-5-((phenylmethyl)amino)-, 2-phenylhydrazide62970-63-2C18H21N3O2
- 1-((4-Methyl-3-nitrophenyl)methyl)-4-phenylpiperazine74101-69-2C18H21N3O2
- 3-Quinolinecarboximidamide, 5,6,7,8-tetrahydro-2-methoxy-N-(4-methoxyphenyl)-171011-13-5C18H21N3O2
- Piperazine, 1-(3-ethoxyphenyl)-4-(3-pyridinylcarbonyl)-124444-89-9C18H21N3O2
- 4-(2-Ethylbutanoylamino)-N-pyridin-3-ylbenzamide879019-10-0C18H21N3O2
- N-{4-[(Anilinocarbonyl)amino]phenyl}-3-methylbutanamide940202-97-1C18H21N3O2
- 3-[(Anilinocarbonyl)amino]-N-(sec-butyl)benzamide940519-99-3C18H21N3O2
- 4-[(Anilinocarbonyl)amino]-N-(tert-butyl)benzamide940454-00-2C18H21N3O2
- N-{3-[(Anilinocarbonyl)amino]phenyl}-2,2-dimethylpropanamide940481-32-3C18H21N3O2
- 5-[4-(2,5-Dimethylphenyl)piperazine-1-carbonyl]pyridin-2-ol1252819-48-9C18H21N3O2
- 1-{2-[(2,3-Dihydro-1H-inden-1-yl)(prop-2-yn-1-yl)amino]acetyl}-3-(prop-2-en-1-yl)urea1241554-55-1C18H21N3O2
- 9,10-Didehydro-N-(2-hydroxyethyl)-6-methylergoline-8beta-carboxamide16369-53-2C18H21N3O2
- 1-Cyclopentyl-3-(3-(pyridin-2-yloxy)benzyl)urea1448047-54-8C18H21N3O2
- 2,3-Dimethyl-4-[1-(1-oxo-2-propen-1-yl)-3-pyrrolidinyl]-1H-indole-7-carboxamide1912444-42-8C18H21N3O2
- 3-Methyl-4-[1-(1-oxo-2-propen-1-yl)-3-piperidinyl]-1H-indole-7-carboxamide1912444-45-1C18H21N3O2
- 1-{2-[(4-Methoxyphenyl)amino]benzoyl}pyrrolidin-3-amine1606660-03-0C18H21N3O2
- (6aR,9R)-N-[(1S)-1-Hydroxyethyl]-7-methyl-6,6a,8,9-tetrahydro-4H-indolo[4,3-fg]quinoline-9-carboxamideC18H21N3O2
- 10,11-Dihydro-11-oxo-5H-dibenzo(b,e)(1,4)diazepine, 10-(2-(dimethylamino)ethyl)-8-methoxy-1668-66-2C18H21N3O2
- N,N-Di(propan-2-yl)-3-(pyridine-2-carbonyl)pyridine-2-carboxamide88329-48-0C18H21N3O2
- N-[2-(1-Cyclohexenyl)ethyl]-3-methyl-4-oxo-3,4-dihydro-1-phthalazinecarboxamide1180820-92-1C18H21N3O2
- N-{2-[(4-Isopropylbenzoyl)amino]ethyl}nicotinamide915894-03-0C18H21N3O2
- Benzyl 2-[(1E)-3-(1H-imidazol-1-yl)prop-1-en-1-yl]pyrrolidine-1-carboxylate956627-43-3C18H21N3O2
- N-[4-[(4-Ethylphenyl)carbamoylamino]phenyl]-N-methylacetamide897331-48-5C18H21N3O2
- 2-(2-(Azepan-1-yl)-2-oxoethyl)-6-phenylpyridazin-3(2H)-one923100-54-3C18H21N3O2
- 2-(4-Phenyl-1-piperazinyl)-3-pyridinecarboxylic acid ethyl ester64256-71-9C18H21N3O2
- 1-(4-Morpholinophenyl)-3-(m-tolyl)urea882356-09-4C18H21N3O2
- 3-[(Anilinocarbonyl)amino]-N,N-diethylbenzamide940208-45-7C18H21N3O2
- N'-{(E)-[3-(pentyloxy)phenyl]methylidene}pyridine-3-carbohydrazide725217-67-4C18H21N3O2
- 1-Boc-4-cyano-4-(3-cyanophenyl)-piperidine375853-88-6C18H21N3O2
- N-Cyclohexyl-2-(naphthalen-2-ylcarbonyl)hydrazinecarboxamide897332-88-6C18H21N3O2
- N-Cyclopentyl-2-[4-(4-methylphenyl)-6-oxo-1,6-dihydropyrimidin-1-yl]acetamide1058423-27-0C18H21N3O2
- 3-{3-[(Anilinocarbonyl)amino]phenyl}-N,N-dimethylpropanamide1158758-97-4C18H21N3O2
- 1-(4-(5-Cyclopropyl-1,3,4-oxadiazol-2-yl)piperidin-1-yl)-2-phenylethanone1170909-05-3C18H21N3O2
- 1-(2,3-Dihydro-1H-inden-5-yl)-4-(3-isopropyl-1,2,4-oxadiazol-5-yl)pyrrolidin-2-one1172338-04-3C18H21N3O2
- 3-Methyl-N-phenyl-2-(phenylcarbamoylamino)butanamide2185-06-0C18H21N3O2
- 3-{4-[(Anilinocarbonyl)amino]phenyl}-N,N-dimethylpropanamide1158345-54-0C18H21N3O2
- (2R)-1-Benzyl-2-methyl-4-(4-nitrophenyl)piperazine1260608-48-7C18H21N3O2
- 2-(2-Methyl-4-oxo-5,6,7,8-tetrahydroquinazolin-3(4H)-yl)-N-(o-tolyl)acetamide1251629-72-7C18H21N3O2
- (E)-3-(Furan-2-yl)-N-((1-(pyridin-2-yl)piperidin-4-yl)methyl)acrylamide1235672-80-6C18H21N3O2
- [4-[1-(3,4-Dimethylphenyl)-1H-pyrazol-4-yl]-3,6-dihydropyridin-1(2H)-yl]acetic acid1243081-69-7C18H21N3O2
- 1-(5-(4-(Dimethylamino)phenyl)-3-(furan-2-yl)-4,5-dihydro-1H-pyrazol-1-yl)propan-1-one1252528-06-5C18H21N3O2
- 4-(2-(2-(1H-Imidazol-4-yl)phenoxy)ethylidene)cyclohexanecarboxamide1192814-99-5C18H21N3O2
- 1-Methyl-4-(2'-methyl-6-nitro-biphenyl-3-yl)-piperazine885692-96-6C18H21N3O2
- 2-Methoxy-N-((1-phenylpyrrolidin-2-yl)methyl)nicotinamide1788556-78-4C18H21N3O2
- 1-(4-(3-Methoxyazetidin-1-yl)phenyl)-3-(m-tolyl)urea2034262-56-9C18H21N3O2
- 4-(Pyridin-4-yloxy)-N-(o-tolyl)piperidine-1-carboxamide2034315-39-2C18H21N3O2
- N-[4-(3-Azetidinylmethyl)phenyl]-N'-(4-methoxyphenyl)urea1884190-82-2C18H21N3O2
- N-(1-((Tetrahydro-2H-pyran-2-yl)methyl)-1H-pyrazol-4-yl)cinnamamide2035007-17-9C18H21N3O2
- 1-((1R,5S)-3-(Pyridin-3-yloxy)-8-azabicyclo[3.2.1]octan-8-yl)-2-(1H-pyrrol-1-yl)ethanone2108575-58-0C18H21N3O2
- N1-(1-cyanocyclohexyl)-N3-cyclopropylbenzene-1,3-dicarboxamide1954729-56-6C18H21N3O2
- 5H-Dibenzo(b,e)(1,4)diazepin-11-one, 10,11-dihydro-10-(2-(dimethylamino)ethyl)-7-methoxy-78110-18-6C18H21N3O2
- 1-(Morpholin-4-ylmethyl)-3-(3-phenylphenyl)urea6342-39-8C18H21N3O2
- 1-[5-(4-Benzylpiperazine-1-carbonyl)-1H-pyrrol-3-yl]ethanone477858-83-6C18H21N3O2
- Pyrazino(1,2-a)(1,4)benzodiazepine, 1,2,3,4,4a,5-hexahydro-3,9-dimethyl-7-(2-furanyl)-, 6-oxide87566-63-0C18H21N3O2
Frequently asked questions
What is the molar mass of C18H21N3O2?
The molar mass of C18H21N3O2 is 311.38 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 2 oxygen atoms. The monoisotopic mass is 311.1634 Da.
How many compounds have the formula C18H21N3O2?
CompoundList lists 434 compounds with the molecular formula C18H21N3O2, including Ethyl 2-phenyl-4-(1-piperidinyl)-5-pyrimidinecarboxylate, (2-Methoxyphenyl)-[4-(pyridin-3-ylmethyl)piperazin-1-yl]methanone, Methyl 6-(4-benzylpiperazino)nicotinate. 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 C18H21N3O2?
C18H21N3O2 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.