Molecular formula
C18H21N3O3
343 compounds have this formula on CompoundList.
- Molar mass
- 327.38g/mol
- Monoisotopic mass
- 327.1583Da
- Atoms
- 45
- Elements
- 4
- Rings plus double bonds
- 10
The formula C18H21N3O3 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 3 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 × 1866.04%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 216.47%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 312.84%14.007 × 3 = 42.021 g/mol
- O Oxygen × 314.66%15.999 × 3 = 47.997 g/mol
Look up another formula
Compounds with the formula C18H21N3O3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 343 compounds
1-(3,5-Dimethoxybenzoyl)-4-(2-pyridinyl)piperazine
CAS 369400-61-3C18H21N3O3
![N-[4-(4-Propanoylpiperazin-1-yl)phenyl]furan-2-carboxamide chemical structure, C18H21N3O3, CAS 688333-50-8](/s/NWSLMJAYZDILSI-UHFFFAOYSA-N.svg)
N-[4-(4-Propanoylpiperazin-1-yl)phenyl]furan-2-carboxamide
CAS 688333-50-8C18H21N3O3
1-(4-Nitrophenyl)-2-(4-phenylpiperazin-1-yl)ethanol
CAS 5930-89-2C18H21N3O3
Benzyl 1-methyl-6-(methylcarbamoyl)-1H,2H,3H,4H-pyrrolo(1,2-a)pyrazine-2-carboxylate
CAS 1049872-76-5C18H21N3O3
![3-[2-(2,3-Dihydro-1H-indol-1-yl)-2-oxoethyl]-1,3-diazaspiro[4.5]decane-2,4-dione chemical structure, C18H21N3O3, CAS 733796-44-6](/s/HMTVYUMKEOPRCV-UHFFFAOYSA-N.svg)
3-[2-(2,3-Dihydro-1H-indol-1-yl)-2-oxoethyl]-1,3-diazaspiro[4.5]decane-2,4-dione
CAS 733796-44-6C18H21N3O3
1-Piperazinecarboxylic acid, 4-(1-naphthylcarbamoyl)-, ethyl ester
CAS 101976-06-1C18H21N3O3
N'-(4-(Dimethylamino)benzylidene)-3,4-dimethoxybenzohydrazide
CAS 357410-07-2C18H21N3O3
![2-[(1-Benzyl-1H-pyrazol-4-yl)carbamoyl]cyclohexanecarboxylic acid chemical structure, C18H21N3O3, CAS 491829-97-1](/s/FMZQRXKMUFIYCN-UHFFFAOYSA-N.svg)
2-[(1-Benzyl-1H-pyrazol-4-yl)carbamoyl]cyclohexanecarboxylic acid
CAS 491829-97-1C18H21N3O3
![2-[4-(Furan-2-carbonyl)piperazin-1-yl]-N-(4-methylphenyl)acetamide chemical structure, C18H21N3O3, CAS 432519-36-3](/s/GAKFKKUTHKEDDT-UHFFFAOYSA-N.svg)
2-[4-(Furan-2-carbonyl)piperazin-1-yl]-N-(4-methylphenyl)acetamide
CAS 432519-36-3C18H21N3O3
5-Morpholin-4-yl-2-nitro-N-(1-phenylethyl)aniline
CAS 347355-86-6C18H21N3O3
n'-(4-(Diethylamino)-2-hydroxybenzylidene)-2-hydroxybenzohydrazide
CAS 316130-82-2C18H21N3O3
1-(2-Methoxyphenyl)-3-(4-morpholin-4-ylphenyl)urea
CAS 793678-25-8C18H21N3O3
![2-Ethoxy-N-[2-[methyl(pyridin-3-ylmethyl)amino]-2-oxoethyl]benzamide chemical structure, C18H21N3O3, CAS 851459-94-4](/s/OSGFQAOPZIMFOQ-UHFFFAOYSA-N.svg)
2-Ethoxy-N-[2-[methyl(pyridin-3-ylmethyl)amino]-2-oxoethyl]benzamide
CAS 851459-94-4C18H21N3O3
N-(4-Methoxyphenyl)-2-(propylcarbamoylamino)benzamide
CAS 304650-93-9C18H21N3O3
![2-[(1-Acetyl-2,3-dihydroindol-5-yl)hydrazinylidene]-5,5-dimethylcyclohexane-1,3-dione chemical structure, C18H21N3O3, CAS 379249-23-7](/s/CHLUEKHDQQEZGC-UHFFFAOYSA-N.svg)
2-[(1-Acetyl-2,3-dihydroindol-5-yl)hydrazinylidene]-5,5-dimethylcyclohexane-1,3-dione
CAS 379249-23-7C18H21N3O3
![N-(2-{[2-(3,4-Dimethylphenoxy)acetyl]amino}ethyl)nicotinamide chemical structure, C18H21N3O3, CAS 876883-09-9](/s/BKIVTQNYTAVFPU-UHFFFAOYSA-N.svg)
N-(2-{[2-(3,4-Dimethylphenoxy)acetyl]amino}ethyl)nicotinamide
CAS 876883-09-9C18H21N3O3
Ethyl 4-(isobutyrylamino)-6-methyl-2-phenyl-5-pyrimidinecarboxylate
CAS 351437-24-6C18H21N3O3
Opc 15161
CAS 121071-92-9C18H21N3O3
![N-[5-(2,2-Dimethyl-propionylamino)-pyridin-2-yl]-3-methoxy-benzamide chemical structure, C18H21N3O3, CAS 842973-42-6](/s/XRSQBYGREWULDP-UHFFFAOYSA-N.svg)
N-[5-(2,2-Dimethyl-propionylamino)-pyridin-2-yl]-3-methoxy-benzamide
CAS 842973-42-6C18H21N3O3
![N-[2-[(3-Propoxybenzoyl)amino]ethyl]pyridine-2-carboxamide chemical structure, C18H21N3O3, CAS 876881-79-7](/s/XHGPWJSAKHROGU-UHFFFAOYSA-N.svg)
N-[2-[(3-Propoxybenzoyl)amino]ethyl]pyridine-2-carboxamide
CAS 876881-79-7C18H21N3O3
![N-[3-(2-p-Tolyloxy-acetylamino)-propyl]-isonicotinamide chemical structure, C18H21N3O3, CAS 876883-01-1](/s/RNWKGOJNHKAAPK-UHFFFAOYSA-N.svg)
N-[3-(2-p-Tolyloxy-acetylamino)-propyl]-isonicotinamide
CAS 876883-01-1C18H21N3O3
![N-[3-(2-p-Tolyloxy-acetylamino)-propyl]-nicotinamide chemical structure, C18H21N3O3, CAS 876882-93-8](/s/ORIVODMXKLPPIV-UHFFFAOYSA-N.svg)
N-[3-(2-p-Tolyloxy-acetylamino)-propyl]-nicotinamide
CAS 876882-93-8C18H21N3O3
![N-{2-[2-(3,4-Dimethyl-phenoxy)-acetylamino]-ethyl}-isonicotinamide chemical structure, C18H21N3O3, CAS 876883-13-5](/s/NUDNFBQDKHUBGH-UHFFFAOYSA-N.svg)
N-{2-[2-(3,4-Dimethyl-phenoxy)-acetylamino]-ethyl}-isonicotinamide
CAS 876883-13-5C18H21N3O3
![N-[3-(2-o-Tolyloxy-acetylamino)-propyl]-nicotinamide chemical structure, C18H21N3O3, CAS 876882-53-0](/s/HJTWVZOMDCOTGU-UHFFFAOYSA-N.svg)
N-[3-(2-o-Tolyloxy-acetylamino)-propyl]-nicotinamide
CAS 876882-53-0C18H21N3O3
- 2-[4-(Furan-2-carbonyl)piperazin-1-yl]-N-(2-methylphenyl)acetamide902728-06-7C18H21N3O3
- 5-(Oxolan-2-ylmethylamino)-2-(4-propoxyphenyl)-1,3-oxazole-4-carbonitrile825600-52-0C18H21N3O3
- [2-Oxo-2-(4-phenylpiperazin-1-yl)ethyl] 1-methylpyrrole-2-carboxylate851289-43-5C18H21N3O3
- 4-[(E)-{[4-(2-Methoxyphenyl)piperazin-1-yl]imino}methyl]benzene-1,2-diol315216-87-6C18H21N3O3
- (E)-N'-(3-Ethoxy-2-hydroxybenzylidene)-2-(p-tolylamino)acetohydrazide413581-00-7C18H21N3O3
- 2-(4-Methoxyphenoxy)-1-(4-pyridin-2-ylpiperazin-1-yl)ethanone378754-79-1C18H21N3O3
- N'-[4-(Diethylamino)-2-hydroxybenzylidene]-2-hydroxybenzohydrazideC18H21N3O3
- 1-(4-Methoxyphenyl)-3-(4-morpholinophenyl)urea880807-81-8C18H21N3O3
- (2,4-Dimethoxyphenyl)-(4-pyridin-2-ylpiperazin-1-yl)methanone433329-18-1C18H21N3O3
- 5-(Diethylamino)-2-{(E)-[(2-methyl-3-nitrophenyl)imino]methyl}phenol5375-68-8C18H21N3O3
- 2-(2-Methoxyphenoxy)-1-(4-pyridin-2-ylpiperazin-1-yl)ethanone433702-05-7C18H21N3O3
- 4-(2,3-Dimethylanilino)-4-oxo-2-(pyridin-3-ylmethylamino)butanoic acid1025759-17-4C18H21N3O3
- N-[3-Methoxy-4-(pentanoylamino)phenyl]pyridine-3-carboxamide528580-66-7C18H21N3O3
- (11Z)-10,11-Dihydro-8-(1-methylethyl)-11-(2-methylpropylidene)-6H-oxepino[2,3-d]pyrazino[1,2-a]pyrimidine-6,9(8H)-dione117013-51-1C18H21N3O3
- N1-(2-Methoxy-4-methylbenzyl)-N2-(2-(pyridin-2-yl)ethyl)oxalamide745047-97-6C18H21N3O3
- N-(4-Ethoxyphenyl)-2-(3-oxo-5,6,7,8-tetrahydrocinnolin-2(3H)-yl)acetamide932972-03-7C18H21N3O3
- N-(4-Methoxyphenyl)-2-(6-methyl-3-oxo-5,6,7,8-tetrahydrocinnolin-2(3H)-yl)acetamide932997-55-2C18H21N3O3
- (1~{R})-7-[(1~{R})-1,2-bis(oxidanyl)ethyl]-1,3-dimethyl-5-(1-methylpyrazol-4-yl)-1~{H}-3-benzazepin-2-one3035187-74-4C18H21N3O3
- N-(2-Methoxy-5-methylphenyl)-2-(3-oxo-5,6,7,8-tetrahydrocinnolin-2(3H)-yl)acetamide932972-19-5C18H21N3O3
- 1-(Benzo[d][1,3]dioxol-5-yl)-3-(4-(dimethylamino)phenethyl)urea1207028-65-6C18H21N3O3
- N-(3-Methoxyphenyl)-2-(3-oxo-3,5,6,7,8,9-hexahydro-2H-cyclohepta[c]pyridazin-2-yl)acetamide1282114-65-1C18H21N3O3
- (2S)-2-Amino-N-[(2S)-1-amino-3-(4-hydroxyphenyl)-1-oxopropan-2-yl]-3-phenylpropanamide38678-74-9C18H21N3O3
- (4-(5-Cyclopropyl-1,3,4-oxadiazol-2-yl)piperidin-1-yl)(4-methoxyphenyl)methanone1171745-88-2C18H21N3O3
- 5-(3-(3,4-Dihydroquinolin-1(2H)-yl)-3-oxopropyl)-3,6-dimethylpyrimidine-2,4(1H,3H)-dione1170402-94-4C18H21N3O3
- 1-(4-Methylbenzyl)-6-oxo-N-((tetrahydrofuran-2-yl)methyl)-1,6-dihydropyridazine-3-carboxamide1049494-16-7C18H21N3O3
- 4-(5-Cyclopentyl-1,2,4-oxadiazol-3-yl)-1-(4-methoxyphenyl)pyrrolidin-2-one1326898-70-7C18H21N3O3
- 1-(2-(5-(p-Tolyl)isoxazol-3-yl)acetyl)piperidine-4-carboxamide946341-82-8C18H21N3O3
- N-[3-(Benzylmethylamino)propyl]-4-nitrobenzamide1844838-64-7C18H21N3O3
- N-(2-(3-(4-Ethoxyphenyl)-6-oxopyridazin-1(6H)-yl)ethyl)cyclopropanecarboxamide921578-30-5C18H21N3O3
- 2-[4-(4-Methylphenyl)-6-oxo-1,6-dihydropyrimidin-1-yl]-N-[(oxolan-2-yl)methyl]acetamide1058226-62-2C18H21N3O3
- N-Cyclohexyl-4-methoxy-6-oxo-1-phenyl-1,6-dihydropyridazine-3-carboxamide921883-01-4C18H21N3O3
- 1 suppliersAPN-C3-NH-Boc1539292-60-8C18H21N3O3
- 3-[1-Oxo-5-(piperidin-4-yl)-2,3-dihydro-1H-isoindol-2-yl]piperidine-2,6-dione2222115-40-2C18H21N3O3
- N-(1-acetyl-4-piperidinyl)-7-methoxy-3-Quinolinecarboxamide2345639-80-5C18H21N3O3
- trans-1-((2-(2-Benzofuranyl)-5-ethyl-5-methyl-1,3-dioxan-2-yl)methyl)-1H-1,2,4-triazole98519-32-5C18H21N3O3
- N-{[1-(2-Ethoxyethyl)benzimidazol-2-yl]ethyl}-2-furylcarboxamide920118-64-5C18H21N3O3
- 5-Amino-1,3-dimethyl-6-(3-propoxyphenoxy)-1H-benzo[d]imidazol-2(3H)-one1800477-35-3C18H21N3O3
- N-Benzyl-N-butyl-N'-(2-nitrophenyl)urea107348-81-2C18H21N3O3
- 4-(2,2-Diethoxyethyl)-2-phenylpyrazolo[1,5-a]pyrimidin-7(4H)-one86969-19-9C18H21N3O3
- N-[4-(Diethylamino)phenyl]-4-methyl-3-nitrobenzamide305375-23-9C18H21N3O3
- 2 suppliers(2S)-1-(2-Aminoacetyl)-N-(4-methoxynaphthalen-2-yl)pyrrolidine-2-carboxamide42761-76-2C18H21N3O3
- N-Cyclopentyl-2-[3-(4-methoxyphenyl)-6-oxopyridazin-1-yl]acetamide837394-35-1C18H21N3O3
- tert-Butyl 4-oxo-2-phenyl-3,4,7,8-tetrahydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate1023953-57-2C18H21N3O3
- Benzene-1,3,5-triyltris[(2-methylaziridin-1-yl)methanone]17315-88-7C18H21N3O3
- 3-[2-(3,5-Dimethyl-1H-pyrazol-4-yl)-2-oxoethyl]-3-hydroxy-1-propyl-1,3-dihydro-2H-indol-2-one1022918-78-0C18H21N3O3
- N-[7-(Furan-2-yl)-5-oxo-7,8-dihydro-6H-quinazolin-2-yl]hexanamide374099-73-7C18H21N3O3
- 2-Phenoxy-N-[(1r,4r)-4-(pyrazin-2-yloxy)cyclohexyl]acetamide2034579-21-8C18H21N3O3
- tert-Butyl N-[[4-(pyridin-3-ylcarbamoyl)phenyl]methyl]carbamate1552311-65-5C18H21N3O3
- (E)-4-(tert-Butyl)-N-(2-(2-(furan-2-ylmethylene)hydrazinyl)-2-oxoethyl)benzamide391877-86-4C18H21N3O3
- Ethyl 4-((3-(6,7-dihydro-5H-pyrrolo[1,2-a]imidazol-3-yl)phenyl)amino)-4-oxobutanoate1396759-46-8C18H21N3O3
- 1-(3-Methoxybenzyl)-4-(4-nitrophenyl)piperazine414893-87-1C18H21N3O3
- Hexanamide, N-(3-nitro-4-(2-pyridinylmethyl)phenyl)-63233-53-4C18H21N3O3
- 1H-1,2,4-Triazole, 1-((2-(2-benzofuranyl)-4,4,6-trimethyl-1,3-dioxan-2-yl)methyl)-, cis-98532-82-2C18H21N3O3
- N-(3,5-Dimethylphenyl)-4-(furan-2-carbonyl)piperazine-1-carboxamide895036-33-6C18H21N3O3
- 1-(2-(1,2-Dimethyl-1H-indol-3-yl)-2-oxoacetyl)piperidine-4-carboxamide862831-86-5C18H21N3O3
- 4-((2,4-Dimethylphenyl)amino)-4-oxo-2-((pyridin-3-ylmethyl)amino)butanoic acid1032638-63-3C18H21N3O3
- 1-(1-(3,4-Dimethylphenyl)-5-oxopyrrolidin-3-yl)-3-(furan-2-ylmethyl)urea891093-04-2C18H21N3O3
- 4-(3-Methylphenyl)-6-[(oxolan-2-yl)methyl]-1H,2H,3H,4H,5H,6H,7H-pyrrolo[3,4-d]pyrimidine-2,5-dione946218-76-4C18H21N3O3
- tert-Butyl 2-(4-aminobenzamido)phenylcarbamate209785-08-0C18H21N3O3
- 1-[(3-Acetyl-1H-indol-1-yl)acetyl]piperidine-4-carboxamide1144478-65-8C18H21N3O3
- 1-Methyl-4-phenyl-6-((tetrahydrofuran-2-yl)methyl)-3,4,6,7-tetrahydro-1H-pyrrolo[3,4-d]pyrimidine-2,5-dione853104-88-8C18H21N3O3
- N'-(3-Ethoxy-2-hydroxybenzylidene)-2-[(2-methylphenyl)amino]acetohydrazide413581-10-9C18H21N3O3
- 6-[2-(1-Azepanyl)-2-oxoethoxy]-2-phenyl-3(2H)-pyridazinone478079-23-1C18H21N3O3
- 3-Pyridinecarboxylic acid, 1-methyl-2-((1-methylethyl)(3-pyridinylcarbonyl)amino)ethyl ester69451-74-7C18H21N3O3
- 1H-1,2,4-Triazole, 1-((2-(2-benzofuranyl)-4,4,6-trimethyl-1,3-dioxan-2-yl)methyl)-, trans-98519-35-8C18H21N3O3
- 6-(1-Hydroxybutan-2-yl)-1,3-dimethyl-5-phenyl-1H-pyrrolo[3,4-d]pyrimidine-2,4(3H,6H)-dione902333-58-8C18H21N3O3
- {4-[4-(Dimethylamino)benzoyl]piperazino}(2-furyl)methanone915913-97-2C18H21N3O3
- N'-Cyclopentyl-N-{2-oxo-1-azatricyclo[6.3.1.0^{4,12}]dodeca-4,6,8(12)-trien-6-yl}ethanediamide898426-84-1C18H21N3O3
- (E)-1-(2-Cyano-3-oxo-3-(phenethylamino)prop-1-en-1-yl)piperidine-4-carboxylic acid885181-28-2C18H21N3O3
- 4-[(4-Methyl-2-pyrrolidin-1-ylquinolin-6-yl)amino]-4-oxobutanoic acid1119451-16-9C18H21N3O3
- Ethyl 4-(4-pyrrol-1-ylbenzoyl)piperazine-1-carboxylate1144434-58-1C18H21N3O3
- N~1~-[2-(1-cyclohexenyl)ethyl]-2-[3-(2-furyl)-6-oxo-1(6H)-pyridazinyl]acetamide1246046-93-4C18H21N3O3
- Peficitinib impurity 4944118-26-7C18H21N3O3
- 5-(4-Benzylpiperidine-1-carbonyl)-3-methylpyrimidine-2,4(1H,3H)-dione1396784-49-8C18H21N3O3
- Methyl 4-{[(1-methyl-4,5,6,7-tetrahydro-1H-indazol-3-yl)methyl]carbamoyl}benzoate1448066-11-2C18H21N3O3
- 4-Oxo-4-phenyl-N-(1-(tetrahydro-2H-pyran-4-yl)-1H-pyrazol-4-yl)butanamide1797319-00-6C18H21N3O3
Frequently asked questions
What is the molar mass of C18H21N3O3?
The molar mass of C18H21N3O3 is 327.38 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 3 oxygen atoms. The monoisotopic mass is 327.1583 Da.
How many compounds have the formula C18H21N3O3?
CompoundList lists 343 compounds with the molecular formula C18H21N3O3, including 1-(3,5-Dimethoxybenzoyl)-4-(2-pyridinyl)piperazine, N-[4-(4-Propanoylpiperazin-1-yl)phenyl]furan-2-carboxamide, 1-(4-Nitrophenyl)-2-(4-phenylpiperazin-1-yl)ethanol. 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 C18H21N3O3?
C18H21N3O3 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.