Molecular formula
C18H21N3O4
333 compounds have this formula on CompoundList.
- Molar mass
- 343.38g/mol
- Monoisotopic mass
- 347.1783Da
- Atoms
- 46
- Elements
- 4
- Rings plus double bonds
- 10
The formula C18H21N3O4 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 4 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 × 1862.96%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 216.16%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 312.24%14.007 × 3 = 42.021 g/mol
- O Oxygen × 418.64%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C18H21N3O4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 333 compounds
Ethacridine lactate
CAS 1837-57-6C18H21N3O4
9-Desfluoro levofloxacin
CAS 117620-85-6C18H21N3O4
![Ethyl 5-[[(E)-(3-methoxyphenyl)methylideneamino]carbamoyl]-2,4-dimethyl-1H-pyrrole-3-carboxylate chemical structure, C18H21N3O4, CAS 865615-15-2](/s/CKUKILNJBSKZBQ-VXLYETTFSA-N.svg)
Ethyl 5-[[(E)-(3-methoxyphenyl)methylideneamino]carbamoyl]-2,4-dimethyl-1H-pyrrole-3-carboxylate
CAS 865615-15-2C18H21N3O4
![Ethyl 5-({[(2-methoxyphenyl)amino]carbonyl}amino)-2,6-dimethylnicotinate chemical structure, C18H21N3O4, CAS 622789-20-2](/s/MJNPOSSWEVPJMW-UHFFFAOYSA-N.svg)
Ethyl 5-({[(2-methoxyphenyl)amino]carbonyl}amino)-2,6-dimethylnicotinate
CAS 622789-20-2C18H21N3O4
![N-[2-(2-Morpholin-4-ylethylcarbamoyl)phenyl]furan-2-carboxamide chemical structure, C18H21N3O4, CAS 667889-95-4](/s/JNYVSIURSXXFHC-UHFFFAOYSA-N.svg)
N-[2-(2-Morpholin-4-ylethylcarbamoyl)phenyl]furan-2-carboxamide
CAS 667889-95-4C18H21N3O4
2-N-(Furan-2-ylmethyl)-1-N-(3-methoxyphenyl)pyrrolidine-1,2-dicarboxamide
CAS 1008265-23-3C18H21N3O4
![N'-[(1E)-(2-Hydroxy-5-nitrophenyl)methylidene]adamantane-1-carbohydrazide chemical structure, C18H21N3O4, CAS 327038-82-4](/s/TYOLLYXXIYYKAX-VXLYETTFSA-N.svg)
N'-[(1E)-(2-Hydroxy-5-nitrophenyl)methylidene]adamantane-1-carbohydrazide
CAS 327038-82-4C18H21N3O4
![2-[4-(Furan-2-carbonyl)piperazin-1-yl]-N-(2-methoxyphenyl)acetamide chemical structure, C18H21N3O4, CAS 835598-85-1](/s/UGBALPWZGAOMNO-UHFFFAOYSA-N.svg)
2-[4-(Furan-2-carbonyl)piperazin-1-yl]-N-(2-methoxyphenyl)acetamide
CAS 835598-85-1C18H21N3O4
2-(3,4-Dimethoxyphenyl)-5-(2,6-dimethylmorpholin-4-yl)-1,3-oxazole-4-carbonitrile
CAS 825600-37-1C18H21N3O4
N-(4-Ethoxyphenyl)-4-(furan-2-carbonyl)piperazine-1-carboxamide
CAS 897504-37-9C18H21N3O4
![Methyl 2-{[4-(2-furylmethyl)piperazinyl]carbonylamino}benzoate chemical structure, C18H21N3O4, CAS 893018-89-8](/s/LXJGSSPRXFZSOJ-UHFFFAOYSA-N.svg)
Methyl 2-{[4-(2-furylmethyl)piperazinyl]carbonylamino}benzoate
CAS 893018-89-8C18H21N3O4
![6-Deoxy-N-[4-(phenyldiazenyl)phenyl]-alpha-L-mannopyranosylamine chemical structure, C18H21N3O4, CAS 1190640-32-4](/s/XGASUXNFWLJGAS-UHFFFAOYSA-N.svg)
6-Deoxy-N-[4-(phenyldiazenyl)phenyl]-alpha-L-mannopyranosylamine
CAS 1190640-32-4C18H21N3O4
4-((4-Ethoxyphenyl)amino)-4-oxo-2-((pyridin-2-ylmethyl)amino)butanoic acid
CAS 1042906-56-8C18H21N3O4
N,N-Diethyl-2-(6-methyl-2-nitropyridin-3-yl)oxy-2-phenylacetamide
CAS 878951-66-7C18H21N3O4
![1,3-Diethyl 2-{[(3-methyl-1-phenyl-1H-pyrazol-5-yl)amino]methylidene}propanedioate chemical structure, C18H21N3O4, CAS 110299-41-7](/s/TVSVMTAKQMRRQA-UHFFFAOYSA-N.svg)
1,3-Diethyl 2-{[(3-methyl-1-phenyl-1H-pyrazol-5-yl)amino]methylidene}propanedioate
CAS 110299-41-7C18H21N3O4
![2-[4-(Furan-2-carbonyl)piperazin-1-yl]-N-(3-methoxyphenyl)acetamide chemical structure, C18H21N3O4, CAS 902728-69-2](/s/BIKNKVXGLZFIQE-UHFFFAOYSA-N.svg)
2-[4-(Furan-2-carbonyl)piperazin-1-yl]-N-(3-methoxyphenyl)acetamide
CAS 902728-69-2C18H21N3O4
![3-{1-[(Benzyloxy)carbonyl]piperidin-3-yl}-1-methyl-1H-pyrazole-4-carboxylic acid chemical structure, C18H21N3O4, CAS 1803586-08-4](/s/SGANCOBZEIXPKJ-UHFFFAOYSA-N.svg)
3-{1-[(Benzyloxy)carbonyl]piperidin-3-yl}-1-methyl-1H-pyrazole-4-carboxylic acid
CAS 1803586-08-4C18H21N3O4
![N-(3-Acetylphenyl)-2-(2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl)acetamide chemical structure, C18H21N3O4, CAS 930909-16-3](/s/QHXISXGWDYSDKT-UHFFFAOYSA-N.svg)
N-(3-Acetylphenyl)-2-(2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl)acetamide
CAS 930909-16-3C18H21N3O4
![N-[4-(Diethylamino)phenyl]-4-methoxy-3-nitrobenzamide chemical structure, C18H21N3O4, CAS 338430-54-9](/s/VNOCFURNPOWPQB-UHFFFAOYSA-N.svg)
N-[4-(Diethylamino)phenyl]-4-methoxy-3-nitrobenzamide
CAS 338430-54-9C18H21N3O4
![N-(4-Acetylphenyl)-2-(2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl)acetamide chemical structure, C18H21N3O4, CAS 876532-52-4](/s/RTOHJFCXRDHWDL-UHFFFAOYSA-N.svg)
N-(4-Acetylphenyl)-2-(2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl)acetamide
CAS 876532-52-4C18H21N3O4
N-(2,5-Dimethoxyphenyl)-2-(3-oxo-5,6,7,8-tetrahydrocinnolin-2(3H)-yl)acetamide
CAS 931361-69-2C18H21N3O4
N1-(2,4-Dimethoxybenzyl)-N2-(2-(pyridin-2-yl)ethyl)oxalamide
CAS 745047-53-4C18H21N3O4
![2-[4-(4-Methylphenyl)-2,5-dioxo-3,4,5,7-tetrahydrofuro[3,4-d]pyrimidin-1(2H)-yl]-N-propylacetamide chemical structure, C18H21N3O4, CAS 1775370-54-1](/s/YVAYNPLBWVJNCF-UHFFFAOYSA-N.svg)
2-[4-(4-Methylphenyl)-2,5-dioxo-3,4,5,7-tetrahydrofuro[3,4-d]pyrimidin-1(2H)-yl]-N-propylacetamide
CAS 1775370-54-1C18H21N3O4
(S)-7-Isopropoxy-1-((5-oxopyrrolidin-2-yl)methoxy)isoquinoline-6-carboxamide
CAS 1817626-80-4C18H21N3O4
- N-[1-(3-Methyl-1,2,4-oxadiazol-5-yl)cyclohexyl]-2,3-dihydro-1,4-benzodioxine-2-carboxamide1326942-45-3C18H21N3O4
- N-(2,3-Dihydro-1H-inden-1-yl)-2-(2,4-dioxo-8-oxa-1,3-diazaspiro[4.5]dec-3-yl)acetamide1775529-16-2C18H21N3O4
- 4-[5-(4-Nitrophenoxy)pentoxy]benzenecarboximidamide67833-85-6C18H21N3O4
- 2-[4-Oxo-6-[(4-phenylpiperazin-1-yl)methyl]pyran-3-yl]oxyacetamide898455-66-8C18H21N3O4
- 2-(2,5-Dioxo-4-phenyl-3,4,5,7-tetrahydrofuro[3,4-d]pyrimidin-1(2H)-yl)-N,N-diethylacetamide1775326-99-2C18H21N3O4
- 3-[2-(3,4-Dihydroquinolin-1(2H)-yl)-2-oxoethyl]-8-oxa-1,3-diazaspiro[4.5]decane-2,4-dione1775477-16-1C18H21N3O4
- N-(2,3-Dihydro-1H-inden-5-yl)-2-(2,4-dioxo-8-oxa-1,3-diazaspiro[4.5]dec-3-yl)acetamide1775334-58-1C18H21N3O4
- 1-(Benzo[d][1,3]dioxol-5-ylmethyl)-4-(3-(tert-butyl)-1,2,4-oxadiazol-5-yl)pyrrolidin-2-one1170402-45-5C18H21N3O4
- N-(5-Ethyl-3,3-dimethyl-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]oxazepin-8-yl)-5-methylisoxazole-3-carboxamide1206986-39-1C18H21N3O4
- Porothramycin A110652-73-8C18H21N3O4
- Ethyl 4-[2-(2-methyl-1H-indol-3-yl)-2-oxoacetyl]piperazine-1-carboxylate852368-54-8C18H21N3O4
- N-(2,4-Dimethoxyphenyl)-2-(3-oxo-5,6,7,8-tetrahydrocinnolin-2(3H)-yl)acetamide932971-99-8C18H21N3O4
- 4-Acetyl-N-[3-(2-Amino-2-Oxoethoxy)phenyl]-3-Ethyl-5-Methyl-1H-Pyrrole-2-Carboxamide1394707-72-2C18H21N3O4
- Tyrosine-4'-aminophenylalanine124985-60-0C18H21N3O4
- 6-(2,5-Dimethoxyphenyl)-2-(2-oxo-2-pyrrolidin-1-ylethyl)pyridazin-3-one941973-36-0C18H21N3O4
- N-{11-Oxo-1-azatricyclo[6.3.1.0^{4,12}]dodeca-4(12),5,7-trien-6-yl}-N'-[(oxolan-2-yl)methyl]ethanediamide898419-01-7C18H21N3O4
- N-(2-(4-Isobutyramidobenzamido)ethyl)furan-2-carboxamide1021206-83-6C18H21N3O4
- Ethyl 4-[3-(3-benzyl-1,2,4-oxadiazol-5-yl)azetidin-1-yl]-4-oxobutanoate1351614-66-8C18H21N3O4
- (R)-7-Isopropoxy-1-((5-oxopyrrolidin-2-yl)methoxy)isoquinoline-6-carboxamide1817626-87-1C18H21N3O4
- 4-Butanamido-N-{2-[(furan-2-yl)formamido]ethyl}benzamide1021206-92-7C18H21N3O4
- Defluoroofloxacin95848-94-5C18H21N3O4
- Tyr-Tyr-NH220240-32-8C18H21N3O4
- Ethyl 1-(3-formyl-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-2-yl)piperidine-4-carboxylate636989-80-5C18H21N3O4
- Ethyl 5-(4-nitrophenyl)-2-piperidino-1H-pyrrole-3-carboxylate338406-28-3C18H21N3O4
- 4-[(2H-1,3-Benzodioxol-5-yl)methyl]-N-[(furan-3-yl)methyl]piperazine-1-carboxamide1223600-60-9C18H21N3O4
- Orb16898502351906-74-4C18H21N3O4
- 2-[4-(Furan-2-carbonyl)piperazin-1-yl]-N-(4-methoxyphenyl)acetamide1062137-17-0C18H21N3O4
- Mazethramycin B68373-95-5C18H21N3O4
- Methyl 3-(2-furylcarbonylamino)-4-(4-methylpiperazinyl)benzoate876889-27-9C18H21N3O4
- tert-Butyl 4-(5-nitro-1H-indol-3-yl)-5,6-dihydropyridine-1(2H)-carboxylate151273-41-5C18H21N3O4
- N1-(2,3-Dimethoxybenzyl)-N2-(2-(pyridin-2-yl)ethyl) oxalamide851670-40-1C18H21N3O4
- Ethyl 2-(((6-methoxy(3-pyridyl))amino)carbonylamino)-3-phenylpropanoate1396966-25-8C18H21N3O4
- 4-(4-Methoxyphenyl)-6-(oxolan-2-ylmethyl)-1,3,4,7-tetrahydropyrrolo[3,4-d]pyrimidine-2,5-dione899942-95-1C18H21N3O4
- 2-[(2-Morpholino-5-nitrophenyl)methylene]-3-quinuclidinone866149-55-5C18H21N3O4
- 2-(3-(4-Methoxyphenyl)-6-oxopyridazin-1(6H)-yl)-N-((tetrahydrofuran-2-yl)methyl)acetamide899752-97-7C18H21N3O4
- Pyr-Trp-OEt87694-58-4C18H21N3O4
- N-(5-Cyclohexyl-1,3,4-oxadiazol-2-yl)-3-methyl-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide1171077-73-8C18H21N3O4
- 1-[4-(Methoxymethoxy)phenyl]-4-(4-nitrophenyl)piperazine1246819-65-7C18H21N3O4
- tert-Butyl 4-(6-nitro-1H-indol-3-yl)-5,6-dihydropyridine-1(2H)-carboxylate1342806-94-3C18H21N3O4
- Butyl 4-(6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxamido)benzoate1428366-29-3C18H21N3O4
- Ethyl 2,4-dimethyl-5-[[(3-methylbenzoyl)amino]carbamoyl]-1H-pyrrole-3-carboxylate865615-23-2C18H21N3O4
- 2-[[4-[(4-Oxoquinazolin-3-yl)methyl]cyclohexanecarbonyl]amino]acetic acid879580-15-1C18H21N3O4
- Diethyl 2-{[(2,3-dimethyl-6-quinoxalinyl)amino]methylene}malonate170948-50-2C18H21N3O4
- Ethyl 5-{[(3-methoxyphenyl)carbamoyl]amino}-2,6-dimethylpyridine-3-carboxylate622789-22-4C18H21N3O4
- 5(4H)-Oxazolone, 4-(di-4-morpholinylmethylene)-2-phenyl-61767-51-9C18H21N3O4
- 2-(2,6-Dioxo-3-piperidyl)-4-(pentylamino)isoindoline-1,3-dione444287-97-2C18H21N3O4
- 4-((4-Ethoxyphenyl)amino)-4-oxo-2-((pyridin-3-ylmethyl)amino)butanoic acid1046801-41-5C18H21N3O4
- ((4-Methoxyphenyl){2-oxo-2-[(2-pyridin-2-ylethyl)-amino]ethyl}amino)acetic acid1142215-84-6C18H21N3O4
- 1-{3-[5-(2H-1,3-Benzodioxol-5-yl)-1,3,4-oxadiazol-2-yl]piperidin-1-yl}butan-1-one1171652-95-1C18H21N3O4
- 4-(4-Hydroxyphenyl)-1-methyl-6-((tetrahydrofuran-2-yl)methyl)-3,4,6,7-tetrahydro-1H-pyrrolo[3,4-d]pyrimidine-2,5-dione1203362-54-2C18H21N3O4
- N-{[1-(Furan-3-carbonyl)piperidin-4-yl]methyl}-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxamide1396748-68-7C18H21N3O4
- Defluoroofloxacin, (R)-117620-83-4C18H21N3O4
- Methyl [(4Z)-4-[1-(cyclopropylamino)ethylidene]-1-(4-methoxyphenyl)-5-oxo-4,5-dihydro-1H-pyrazol-3-yl]acetate879056-96-9C18H21N3O4
- N'-{(E)-[4-(diethylamino)-2-hydroxyphenyl]methylidene}-3,5-dihydroxybenzohydrazide303768-81-2C18H21N3O4
- GA-017, 10 mM in DMSOC18H21N3O4
- Benzamide, N-((4-(2-(dimethylamino)ethoxy)phenyl)methyl)-3-nitro-122892-80-2C18H21N3O4
- 4-Ethoxy-N-(5-methyl-1,2-oxazol-3-yl)-N-[(2-oxopyrrolidin-1-yl)methyl]benzamide852132-27-5C18H21N3O4
- [(Z)-[Amino-(4-nitrophenyl)methylidene]amino] adamantane-1-carboxylate6572-95-8C18H21N3O4
- 6-(3,4-Dimethoxyphenyl)-2-(2-oxo-2-pyrrolidin-1-ylethyl)pyridazin-3-one923102-16-3C18H21N3O4
- 1-[1-(4-Acetylphenyl)-2,5-dioxopyrrolidin-3-yl]piperidine-4-carboxamide895358-12-0C18H21N3O4
- N'-(2-Cyanophenyl)-N-({1,4-dioxaspiro[4.5]decan-2-yl}methyl)ethanediamide899730-54-2C18H21N3O4
- 2-((2-Hydroxyethyl)amino)-4-oxo-4-((4-(phenylamino)phenyl)amino)butanoic acid1097868-05-7C18H21N3O4
- 3-((1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)carbamoyl)cyclopentanecarboxylic acid1354488-61-1C18H21N3O4
- 1-(4-O-Methoxymethyl-4-hydroxyphenyl)-4-(4-nitrophenyl)piperazine-d41246819-68-0C18H21N3O4
- N-(2-(Cyclohex-1-en-1-yl)ethyl)-3-(furan-2-ylmethyl)-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxamide1396786-30-3C18H21N3O4
- (3,4-Dimethoxyphenyl)(4-(pyridazin-3-yloxy)piperidin-1-yl)methanone1448068-72-1C18H21N3O4
- Methyl 7-(2-(3,5-dimethylisoxazol-4-yl)acetamido)-3,4-dihydroisoquinoline-2(1H)-carboxylate1797967-79-3C18H21N3O4
- 3-Methyl-N-(1-(tetrahydro-2H-pyran-4-yl)-1H-pyrazol-4-yl)-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide1797091-03-2C18H21N3O4
- 4-((1-(2-Methoxynicotinoyl)pyrrolidin-3-yl)oxy)-1,6-dimethylpyridin-2(1H)-one2034239-51-3C18H21N3O4
- 1-[4-(1,3-Dioxoisoindol-2-yl)butanoyl]piperidine-4-carboxamide701252-02-0C18H21N3O4
- 1-(5-tert-Butyl-2-methoxyphenyl)-3-(4-nitrophenyl)urea706770-46-9C18H21N3O4
- N-[2-(4-Nitroanilino)ethyl]-4-propan-2-yloxybenzamide774563-87-0C18H21N3O4
- Pyridine, 3-(5,5-dimethyl-4-(4-pyridinyl)-2-pyrrolidinyl)-, trans-(+-)-, ethanedioate (1:1)74650-43-4C18H21N3O4
- 3,5-Pyridinedicarboxamide, 1,4-dihydro-4-(1,3-benzodioxol-5-yl)-N,N',2,6-tetramethyl-161771-89-7C18H21N3O4
- N,N-Dimethyl-2-(1-(2-morpholino-2-oxoethyl)-1H-indol-3-yl)-2-oxoacetamide872855-01-1C18H21N3O4
- N-Ethyl-2-(1-(2-morpholino-2-oxoethyl)-1H-indol-3-yl)-2-oxoacetamide872855-39-5C18H21N3O4
Frequently asked questions
What is the molar mass of C18H21N3O4?
The molar mass of C18H21N3O4 is 343.38 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 4 oxygen atoms. The monoisotopic mass is 347.1783 Da.
How many compounds have the formula C18H21N3O4?
CompoundList lists 333 compounds with the molecular formula C18H21N3O4, including Ethacridine lactate, 9-Desfluoro levofloxacin, Ethyl 5-[[(E)-(3-methoxyphenyl)methylideneamino]carbamoyl]-2,4-dimethyl-1H-pyrrole-3-carboxylate. 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 C18H21N3O4?
C18H21N3O4 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.