Molecular formula
C21H18N4O3
171 compounds have this formula on CompoundList.
- Molar mass
- 374.40g/mol
- Monoisotopic mass
- 374.1379Da
- Atoms
- 46
- Elements
- 4
- Rings plus double bonds
- 15
The formula C21H18N4O3 describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 4 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 × 2167.37%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 184.85%1.008 × 18 = 18.144 g/mol
- N Nitrogen × 414.96%14.007 × 4 = 56.028 g/mol
- O Oxygen × 312.82%15.999 × 3 = 47.997 g/mol
Look up another formula
Compounds with the formula C21H18N4O3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 171 compounds
6-Oxo-3-(2-phenylpyrazolo(1,5-a)pyridin-3-yl)-1(6H)-pyridazinebutanoic acid
CAS 131185-37-0C21H18N4O3
Nmdpef
CAS 874484-20-5C21H18N4O3
4-Oxo-4-(5-phenyl-3-quinoxalin-6-yl-3,4-dihydropyrazol-2-yl)butanoic acid
CAS 442649-90-3C21H18N4O3
1-Benzyl-2-imino-10-oxo-1,10-dihydro-2H-1,9,10a-triaza-anthracene-3-carboxylic acid ethyl ester
CAS 497242-28-1C21H18N4O3
N,N'-Bis(5-methyl-3-phenyl-4-isoxazolyl)urea
CAS 240799-55-7C21H18N4O3
![N-[4-[(Phenylcarbamoylamino)carbamoyl]phenyl]benzamide chemical structure, C21H18N4O3, CAS 225659-02-9](/s/KZMJYRNXKMCTMX-UHFFFAOYSA-N.svg)
N-[4-[(Phenylcarbamoylamino)carbamoyl]phenyl]benzamide
CAS 225659-02-9C21H18N4O3
Methyl 1-benzyl-2-imino-10-methyl-5-oxo-1,5-dihydro-2H-dipyrido(1,2-A:2,3-D)pyrimidine-3-carboxylate
CAS 371926-99-7C21H18N4O3
N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)-5-phenyl-3-isoxazolecarboxamide
CAS 712347-96-1C21H18N4O3
![Methyl 2-imino-5-oxo-1-(2-phenylethyl)-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxylate chemical structure, C21H18N4O3, CAS 371130-06-2](/s/FEJVXZFZIBZSMW-UHFFFAOYSA-N.svg)
Methyl 2-imino-5-oxo-1-(2-phenylethyl)-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxylate
CAS 371130-06-2C21H18N4O3
6-(Fmoc-amino)pyridine-3-amidoxime
CAS 1188481-21-1C21H18N4O3
4,6-Dihydro-4-(4-methoxyphenyl)-6-methylpyrido(3',2':5,6)pyrimido(1,2-a)benzimidazole-2,5(1H,3H)-dione
CAS 889952-09-4C21H18N4O3
![N-(4-(Imidazo[1,2-a]pyrimidin-2-yl)phenyl)-2,3-dimethoxybenzamide chemical structure, C21H18N4O3, CAS 862811-21-0](/s/UDMPZTFEGOVRSJ-UHFFFAOYSA-N.svg)
N-(4-(Imidazo[1,2-a]pyrimidin-2-yl)phenyl)-2,3-dimethoxybenzamide
CAS 862811-21-0C21H18N4O3
![N-(3-Imidazo[1,2-a]pyrimidin-2-ylphenyl)-3,5-dimethoxybenzamide chemical structure, C21H18N4O3, CAS 863020-15-9](/s/CNDBGJUZZUHWME-UHFFFAOYSA-N.svg)
N-(3-Imidazo[1,2-a]pyrimidin-2-ylphenyl)-3,5-dimethoxybenzamide
CAS 863020-15-9C21H18N4O3
![2-(Benzo[d][1,3]dioxol-5-ylmethyl)-6-(3,4-dimethylphenyl)-[1,2,4]triazolo[4,3-b]pyridazin-3(2H)-one chemical structure, C21H18N4O3, CAS 1251604-34-8](/s/GREQVNIUEKUNEA-UHFFFAOYSA-N.svg)
2-(Benzo[d][1,3]dioxol-5-ylmethyl)-6-(3,4-dimethylphenyl)-[1,2,4]triazolo[4,3-b]pyridazin-3(2H)-one
CAS 1251604-34-8C21H18N4O3
Tubulin/HDAC-IN-1
CAS 2413587-26-3C21H18N4O3
![N-(4-(6-Methoxyimidazo[1,2-b]pyridazin-2-yl)phenyl)-2-phenoxyacetamide chemical structure, C21H18N4O3, CAS 953216-43-8](/s/YTASHFVHWBJZHD-UHFFFAOYSA-N.svg)
N-(4-(6-Methoxyimidazo[1,2-b]pyridazin-2-yl)phenyl)-2-phenoxyacetamide
CAS 953216-43-8C21H18N4O3
![N-(3-Imidazo[1,2-a]pyrimidin-2-ylphenyl)-2,3-dimethoxybenzamide chemical structure, C21H18N4O3, CAS 863020-14-8](/s/HFZWADCZYGXMFZ-UHFFFAOYSA-N.svg)
N-(3-Imidazo[1,2-a]pyrimidin-2-ylphenyl)-2,3-dimethoxybenzamide
CAS 863020-14-8C21H18N4O3
Methyl 3-(1,2-dimethyl-3-oxo-5-(quinoxalin-6-yl)-2,3-dihydro-1H-pyrazol-4-yl)benzoate
CAS 937279-05-5C21H18N4O3
Verrucine F
CAS 1049778-80-4C21H18N4O3
N-(5-Methoxy-quinolin-8-yl)-2-(3-methyl-4-oxo-3,4-dihydro-phthalazin-1-yl)-acetamide
CAS 606096-99-5C21H18N4O3
N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)-2-imino-2H-chromene-3-carboxamide
CAS 669711-84-6C21H18N4O3
![[(3Z)-3-{[4-(3-Methoxyphenyl)-1H-pyrrol-2-yl]methylidene}-2-oxo-2,3-dihydro-1H-indol-5-yl]urea chemical structure, C21H18N4O3, CAS 1056225-28-5](/s/RULBQJYTXYLQOK-ZDLGFXPLSA-N.svg)
[(3Z)-3-{[4-(3-Methoxyphenyl)-1H-pyrrol-2-yl]methylidene}-2-oxo-2,3-dihydro-1H-indol-5-yl]urea
CAS 1056225-28-5C21H18N4O3
![N-(2,5-Dimethoxyphenyl)-7-phenylpyrazolo[1,5-a]pyrimidine-3-carboxamide chemical structure, C21H18N4O3, CAS 1181488-31-2](/s/PDDNOJLLBVAHLR-UHFFFAOYSA-N.svg)
N-(2,5-Dimethoxyphenyl)-7-phenylpyrazolo[1,5-a]pyrimidine-3-carboxamide
CAS 1181488-31-2C21H18N4O3
![6-Amino-4-(3,4-dimethoxyphenyl)-3-phenyl-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile chemical structure, C21H18N4O3, CAS 315246-25-4](/s/GRIOPVOPNWOTAY-UHFFFAOYSA-N.svg)
6-Amino-4-(3,4-dimethoxyphenyl)-3-phenyl-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile
CAS 315246-25-4C21H18N4O3
- 1-(2,5-Diphenyloxazol-4-yl)-4-((2-hydroxyethyl)amino)pyrimidin-2(1H)-one923211-96-5C21H18N4O3
- 4-[6-(3,4-Dimethoxyphenyl)imidazo[1,2-b]pyridazin-3-yl]benzamide1084951-17-6C21H18N4O3
- 4-[[[5-(1H-Indol-5-yl)-1-methylpyrazole-3-carbonyl]amino]methyl]benzoic acid1222173-84-3C21H18N4O3
- Antimalarial agent 252944456-41-9C21H18N4O3
- Methyl 6-imino-7-[(4-methylphenyl)methyl]-2-oxo-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxylate370869-23-1C21H18N4O3
- Ethyl 2-(1,3-benzoxazol-2-ylamino)-4-methyl-6-phenylpyrimidine-5-carboxylate669718-58-5C21H18N4O3
- 3-{[(3-Oxo-3,4-dihydro-2H-1,4-benzoxazin-7-yl)amino]methyl}-N-(pyridin-3-yl)benzamide2095746-70-4C21H18N4O3
- Methyl 7-benzyl-6-imino-13-methyl-2-oxo-1,7,9-triazatricyclo[8.4.0.0^{3,8}]tetradeca-3(8),4,9,11,13-pentaene-5-carboxylate842961-65-3C21H18N4O3
- 4-(6-Acetyl-5-methyl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)phenyl benzoate361481-30-3C21H18N4O3
- (E)-5-(4-(Furan-2-carbonyl)piperazin-1-yl)-2-styryloxazole-4-carbonitrile941254-92-8C21H18N4O3
- N-(2-Ethoxyphenyl)-5-(furan-2-yl)-1-phenyl-1H-1,2,3-triazole-4-carboxamide951896-76-7C21H18N4O3
- 2-(5-Oxo-1a,2-dihydro-1H-cyclopropa[c]indole-3-carbonyl)-7,8-dihydro-3H-pyrrolo[3,2-e]indole-6-carboxamide128050-92-0C21H18N4O3
- Benzamide, 4-nitro-N-[2-methyl-4-(2-tolylazo)phenyl]-317337-52-3C21H18N4O3
- 1-[2-(4-Cyanophenoxy)propanoylamino]-3-naphthalen-1-ylurea445016-62-6C21H18N4O3
- 5-Cyclopropyl-1-(4-methylphenyl)-N-(3-oxo-1,3-dihydro-2-benzofuran-5-yl)-1H-1,2,3-triazole-4-carboxamide954792-75-7C21H18N4O3
- 1-[2-(2,3-Dihydro-1H-indol-1-yl)-2-oxoethyl]-6-oxo-N-phenyl-1,6-dihydropyridazine-3-carboxamide946366-77-4C21H18N4O3
- 6-(4-Methoxyphenyl)-2-((3-(p-tolyl)-1,2,4-oxadiazol-5-yl)methyl)pyridazin-3(2H)-one1040631-70-6C21H18N4O3
- 8-(2-Hydroxyethyl)-3-methyl-6,7-diphenyl-pteridine-2,4-dione13300-13-5C21H18N4O3
- Pyrazole-4-carboxylic acid, 5-(3,4-dihydro-2-methyl-4-oxoquinazolin-3-yl)-1-phenyl-, ethyl ester104907-90-6C21H18N4O3
- (Z)-N-(1-(1-Cyano-2-((2-methoxyethyl)amino)-2-oxoethylidene)-1H-isoindol-3-yl)benzamide906261-56-1C21H18N4O3
- 1-(3,4-Dimethylphenyl)-5-methyl-N-(2-oxo-2H-chromen-6-yl)-1H-1,2,3-triazole-4-carboxamide923211-38-5C21H18N4O3
- 2-(4-Pyridyl)-8-(tetrahydro-2-furanylmethyl)pyrido[4,3-b][1,6]naphthyridine-1,9(2H,8H)-dione1158446-97-9C21H18N4O3
- 2-(Benzo[d]isoxazol-3-yl)-N-(2-((6-phenylpyridazin-3-yl)oxy)ethyl)acetamide1207048-91-6C21H18N4O3
- 2-(4-Oxoquinazolin-3(4H)-yl)-N-(2-(quinolin-8-yloxy)ethyl)acetamide1207026-32-1C21H18N4O3
- 1-(3,4-Dimethylphenyl)-3-[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]-1,4-dihydropyridazin-4-one1112374-03-4C21H18N4O3
- 3,4-Dimethoxy-N-[2-(pyridin-2-yl)-1H-benzimidazol-5-yl]benzamide1324080-71-8C21H18N4O3
- N-(1H-Indol-4-yl)-2-[3-(4-methoxyphenyl)-6-oxopyridazin-1(6H)-yl]acetamide1324061-68-8C21H18N4O3
- N-{3-[1-(Furan-2-carbonyl)-5-(pyridin-3-yl)-4,5-dihydro-1H-pyrazol-3-yl]phenyl}acetamide1448027-54-0C21H18N4O3
- Agn-PC-0LP16M6769-44-4C21H18N4O3
- N-(5-Imidazo[1,2-a]pyrimidin-2-yl-2-methoxyphenyl)-3-methoxybenzamide847388-04-9C21H18N4O3
- 3-(4-Cyano-3-methyl-1-oxo-1,5-dihydropyrido[1,2-a]benzimidazol-2-yl)-N-(furan-2-ylmethyl)propanamide929837-21-8C21H18N4O3
- 2-Methoxy-N-(4-(6-methoxyimidazo[1,2-b]pyridazin-2-yl)phenyl)benzamide955801-91-9C21H18N4O3
- N-(3-Methoxyphenyl)-2-(4-oxo-2-phenylpyrazolo[1,5-a]pyrazin-5(4H)-yl)acetamide941893-72-7C21H18N4O3
- 2-(2-Pyridyl)-8-(tetrahydro-2-furanylmethyl)pyrido[4,3-b][1,6]naphthyridine-1,9(2H,8H)-dione1158417-13-0C21H18N4O3
- 1-Phenyl-3-{3-[4-(propan-2-yloxy)phenyl]-1,2,4-oxadiazol-5-yl}pyridazin-4(1H)-one1251547-61-1C21H18N4O3
- 3-(3-(2-Ethoxyphenyl)-1,2,4-oxadiazol-5-yl)-1-(p-tolyl)pyridazin-4(1H)-one1112339-09-9C21H18N4O3
- 3-(3-(3-Ethoxyphenyl)-1,2,4-oxadiazol-5-yl)-1-(p-tolyl)pyridazin-4(1H)-one1112432-95-7C21H18N4O3
- 2-(4-Methoxybenzyl)-6-(3-(p-tolyl)-1,2,4-oxadiazol-5-yl)pyridazin-3(2H)-one1251635-10-5C21H18N4O3
- 2-{[3-(2-Methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl}-6-(4-methylphenyl)pyridazin-3(2H)-one1207026-79-6C21H18N4O3
- 3,5-Dimethoxy-N-[2-(pyridin-3-yl)-1H-benzimidazol-5-yl]benzamide1310940-75-0C21H18N4O3
- 3,4-Dimethoxy-N-[2-(pyridin-3-yl)-1H-benzimidazol-5-yl]benzamide1310937-05-3C21H18N4O3
- 6-(2-Furyl)-2-[2-oxo-2-(1,3,4,5-tetrahydro-2H-pyrido[4,3-b]indol-2-yl)ethyl]-3(2H)-pyridazinone1351686-51-5C21H18N4O3
- 4-Hydroxy-N-(3-isopropyl-4-oxo-3,4-dihydroquinazolin-6-yl)quinoline-3-carboxamide1574405-60-9C21H18N4O3
- 1'-(2-Phenyl-2H-1,2,3-triazole-4-carbonyl)-3H-spiro[isobenzofuran-1,4'-piperidin]-3-one1797702-64-7C21H18N4O3
- 1-Benzyl-4-hydroxy-N~5~-(4-methylphenyl)-6-oxo-6,7-dihydro-1H-pyrazolo[3,4-b]pyridine-5-carboxamide1251631-05-6C21H18N4O3
- N-(3-Cyanophenyl)-3a(2),4a(2)-dihydro-2,5-dioxospiro[imidazolidine-4,1a(2)(2a(2)H)-naphthalene]-1-acetamide850349-35-8C21H18N4O3
- 1,6,7-Trimethyl-3-(naphthalen-1-ylmethyl)oxazolo[2,3-f]purine-2,4(1H,3H)-dione899751-68-9C21H18N4O3
- N-(5-{Imidazo[1,2-a]pyrimidin-2-yl}-2-methoxyphenyl)-2-methoxybenzamide847388-03-8C21H18N4O3
- N-(5-(Imidazo[1,2-a]pyrimidin-2-yl)-2-methoxyphenyl)-4-methoxybenzamide862810-70-6C21H18N4O3
- N-(2-Methoxyphenyl)-5-methyl-3-oxo-2-phenyl-3,5-dihydro-2H-pyrazolo[4,3-c]pyridine-7-carboxamide921880-12-8C21H18N4O3
- N-(3-Methoxyphenyl)-5-methyl-3-oxo-2-phenyl-3,5-dihydro-2H-pyrazolo[4,3-c]pyridine-7-carboxamide921507-62-2C21H18N4O3
- N-(4-Methoxyphenyl)-5-methyl-3-oxo-2-phenyl-3,5-dihydro-2H-pyrazolo[4,3-c]pyridine-7-carboxamide921574-78-9C21H18N4O3
- N'-(2-Cyanophenyl)-N-{2-oxo-1-azatricyclo[7.3.1.0^{5,13}]trideca-5,7,9(13)-trien-7-yl}ethanediamide898423-22-8C21H18N4O3
- N-(4-Methoxyphenyl)-2-(4-oxo-2-phenylpyrazolo[1,5-a]pyrazin-5(4H)-yl)acetamide941920-21-4C21H18N4O3
- N-(3-(6-Methoxyimidazo[1,2-b]pyridazin-2-yl)phenyl)-2-phenoxyacetamide953214-55-6C21H18N4O3
- N-(2-Methoxyphenyl)-2-(4-oxo-2-phenylpyrazolo[1,5-a]pyrazin-5(4H)-yl)acetamide941962-97-6C21H18N4O3
- 1-Allyl-2'-amino-6',7'-dimethyl-2,5'-dioxo-5',6'-dihydrospiro[indoline-3,4'-pyrano[3,2-c]pyridine]-3'-carbonitrile886178-93-4C21H18N4O3
- 2-((3-(4-Methoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)-6-(p-tolyl)pyridazin-3(2H)-one1040657-96-2C21H18N4O3
- 6-(4-Methoxyphenyl)-2-((3-(o-tolyl)-1,2,4-oxadiazol-5-yl)methyl)pyridazin-3(2H)-one1040642-98-5C21H18N4O3
- 3-Allyl-1-((3-(o-tolyl)-1,2,4-oxadiazol-5-yl)methyl)quinazoline-2,4(1H,3H)-dione1207024-09-6C21H18N4O3
- N-(3-(6-Oxo-3-(pyridin-4-yl)pyridazin-1(6H)-yl)propyl)benzofuran-2-carboxamide1207046-40-9C21H18N4O3
- 3-(3-(3-Ethoxyphenyl)-1,2,4-oxadiazol-5-yl)-1-(m-tolyl)pyridazin-4(1H)-one1251584-60-7C21H18N4O3
- N-(1H-Indol-6-yl)-2-[3-(4-methoxyphenyl)-6-oxopyridazin-1(6H)-yl]acetamide1246064-48-1C21H18N4O3
- N-(1-Methyl-1H-pyrazol-4-yl)-1,3-dioxo-2-(2-phenylethyl)-2,3-dihydro-1H-isoindole-5-carboxamide1279315-80-8C21H18N4O3
- N-(5-(5-Oxo-1-phenylpyrrolidin-3-yl)-1,3,4-oxadiazol-2-yl)cinnamamide1286744-41-9C21H18N4O3
- 2-(Benzo[d]isoxazol-3-yl)-N-(2-(6-oxo-4-phenylpyrimidin-1(6H)-yl)ethyl)acetamide1334371-45-7C21H18N4O3
- N-(1H-Indol-4-yl)-2-[3-(3-methoxyphenyl)-6-oxopyridazin-1(6H)-yl]acetamide1324092-87-6C21H18N4O3
- (E)-3-(Furan-2-yl)-N-[2-(4-methoxyphenyl)-6-methylbenzotriazol-5-yl]prop-2-enamide425624-50-6C21H18N4O3
- N-(3-Imidazo[1,2-a]pyrimidin-2-ylphenyl)-3,4-dimethoxybenzamide847387-56-8C21H18N4O3
- Benzyl 2-[1-(2-methylphenyl)-4-oxopyrazolo[3,4-d]pyrimidin-5-yl]acetate895013-10-2C21H18N4O3
- 5-[2-(4-Methoxyphenyl)-2-oxoethyl]-1-(2-methylphenyl)pyrazolo[3,4-d]pyrimidin-4-one895013-59-9C21H18N4O3
- Benzamide, 4-[2-oxo-2-[[4-(2-phenyldiazenyl)phenyl]amino]ethoxy]-1008606-26-5C21H18N4O3
- 1-[[3-(4-Methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]-3-naphthalen-1-ylurea890342-02-6C21H18N4O3
- 1-[3-(Furan-2-ylmethyl)-2-oxoquinazolin-4-yl]-3-(3-methylphenyl)urea941895-56-3C21H18N4O3
- N-(2-Methoxy-5-(6-methoxyimidazo[1,2-b]pyridazin-2-yl)phenyl)benzamide953215-05-9C21H18N4O3
- 1-Benzyl-3-(benzyloxy)-N-(isoxazol-3-yl)-1H-pyrazole-4-carboxamide1013769-62-4C21H18N4O3
Frequently asked questions
What is the molar mass of C21H18N4O3?
The molar mass of C21H18N4O3 is 374.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 3 oxygen atoms. The monoisotopic mass is 374.1379 Da.
How many compounds have the formula C21H18N4O3?
CompoundList lists 171 compounds with the molecular formula C21H18N4O3, including 6-Oxo-3-(2-phenylpyrazolo(1,5-a)pyridin-3-yl)-1(6H)-pyridazinebutanoic acid, Nmdpef, 4-Oxo-4-(5-phenyl-3-quinoxalin-6-yl-3,4-dihydropyrazol-2-yl)butanoic acid. 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 C21H18N4O3?
C21H18N4O3 has a degree of unsaturation of 15. 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.