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 101 to 200 of 333 compounds
![6-[2-(2,6-Dimethylmorpholino)-2-oxoethoxy]-2-phenyl-3(2H)-pyridazinone chemical structure, C18H21N3O4, CAS 439111-72-5](/s/MJPUSCHKOHYBRM-UHFFFAOYSA-N.svg)
6-[2-(2,6-Dimethylmorpholino)-2-oxoethoxy]-2-phenyl-3(2H)-pyridazinone
CAS 439111-72-5C18H21N3O4
![N-[3-[(3,5-Dimethoxybenzoyl)amino]propyl]pyridine-4-carboxamide chemical structure, C18H21N3O4, CAS 876882-33-6](/s/BEELHBPOXFPEDZ-UHFFFAOYSA-N.svg)
N-[3-[(3,5-Dimethoxybenzoyl)amino]propyl]pyridine-4-carboxamide
CAS 876882-33-6C18H21N3O4
![N-{2-[(3,4-Dimethoxybenzoyl)amino]ethyl}-6-methylnicotinamide chemical structure, C18H21N3O4, CAS 879032-43-6](/s/VAUICNNGMJUGNM-UHFFFAOYSA-N.svg)
N-{2-[(3,4-Dimethoxybenzoyl)amino]ethyl}-6-methylnicotinamide
CAS 879032-43-6C18H21N3O4
4-(1,3-Benzodioxol-5-ylmethyl)-N-(furan-2-ylmethyl)piperazine-1-carboxamide
CAS 925081-97-6C18H21N3O4
![N-{2-Oxo-1-azatricyclo[6.3.1.0^{4,12}]dodeca-4,6,8(12)-trien-6-yl}-N'-[(oxolan-2-yl)methyl]ethanediamide chemical structure, C18H21N3O4, CAS 898454-74-5](/s/SINJEGMSNKHBMU-UHFFFAOYSA-N.svg)
N-{2-Oxo-1-azatricyclo[6.3.1.0^{4,12}]dodeca-4,6,8(12)-trien-6-yl}-N'-[(oxolan-2-yl)methyl]ethanediamide
CAS 898454-74-5C18H21N3O4
1-(2-(5-(3-Methoxyphenyl)isoxazol-3-yl)acetyl)piperidine-4-carboxamide
CAS 953139-36-1C18H21N3O4
1-(4-Acetylpiperazin-1-yl)-2-(5-(4-methoxyphenyl)isoxazol-3-yl)ethanone
CAS 953180-78-4C18H21N3O4
1-(2-(5-(4-Methoxyphenyl)isoxazol-3-yl)acetyl)piperidine-4-carboxamide
CAS 953255-76-0C18H21N3O4
L-Alanyl-N-(4-methyl-2-oxo-2H-1-benzopyran-7-yl)-L-prolinamide
CAS 658058-21-0C18H21N3O4
![6-(4-Ethoxyphenyl)-3-[2-(morpholin-4-yl)-2-oxoethyl]-3,4-dihydropyrimidin-4-one chemical structure, C18H21N3O4, CAS 1058207-62-7](/s/JBDVHRQHYZJWES-UHFFFAOYSA-N.svg)
6-(4-Ethoxyphenyl)-3-[2-(morpholin-4-yl)-2-oxoethyl]-3,4-dihydropyrimidin-4-one
CAS 1058207-62-7C18H21N3O4
![N-(5-Methyl-1,2-oxazol-3-yl)-N'-[(4-phenyloxan-4-yl)methyl]ethanediamide chemical structure, C18H21N3O4, CAS 1091080-35-1](/s/IVYQGTPZELTWMU-UHFFFAOYSA-N.svg)
N-(5-Methyl-1,2-oxazol-3-yl)-N'-[(4-phenyloxan-4-yl)methyl]ethanediamide
CAS 1091080-35-1C18H21N3O4
N1-(isoxazol-3-yl)-N2-((1-(4-methoxyphenyl)cyclopentyl)methyl)oxalamide
CAS 1091475-06-7C18H21N3O4
5-Cyclopropyl-N-(4-(2-((2-methoxyethyl)amino)-2-oxoethyl)phenyl)isoxazole-3-carboxamide
CAS 1396750-17-6C18H21N3O4
![1-(3-(5-(Benzo[d][1,3]dioxol-5-yl)-1,3,4-oxadiazol-2-yl)piperidin-1-yl)-2-methylpropan-1-one chemical structure, C18H21N3O4, CAS 1171058-23-3](/s/VZPCYITVWUSKGF-UHFFFAOYSA-N.svg)
1-(3-(5-(Benzo[d][1,3]dioxol-5-yl)-1,3,4-oxadiazol-2-yl)piperidin-1-yl)-2-methylpropan-1-one
CAS 1171058-23-3C18H21N3O4
2-(4-(4-Methoxyphenyl)-6-oxopyrimidin-1(6H)-yl)-N-((tetrahydrofuran-2-yl)methyl)acetamide
CAS 1060179-00-1C18H21N3O4
N1-(3,4-dimethoxyphenethyl)-N2-(6-methylpyridin-2-yl)oxalamide
CAS 920240-57-9C18H21N3O4
![N-[5-(Azepane-1-carbonyl)-1-methyl-2-oxo-1,2-dihydropyridin-3-yl]furan-2-carboxamide chemical structure, C18H21N3O4, CAS 1202982-02-2](/s/YDEDUPUJXHXOBD-UHFFFAOYSA-N.svg)
N-[5-(Azepane-1-carbonyl)-1-methyl-2-oxo-1,2-dihydropyridin-3-yl]furan-2-carboxamide
CAS 1202982-02-2C18H21N3O4
1-Oxo-1-(pyrrolidin-1-yl)propan-2-yl 3-ethyl-4-oxo-3,4-dihydrophthalazine-1-carboxylate
CAS 1009535-74-3C18H21N3O4
Phenyl 4-((5-methylisoxazole-3-carboxamido)methyl)piperidine-1-carboxylate
CAS 1234829-08-3C18H21N3O4
![2-(3-(Benzo[d][1,3]dioxol-5-yl)-6-oxopyridazin-1(6H)-yl)-N-butylpropanamide chemical structure, C18H21N3O4, CAS 1203166-53-3](/s/PUMIFDVKGRZCNY-UHFFFAOYSA-N.svg)
2-(3-(Benzo[d][1,3]dioxol-5-yl)-6-oxopyridazin-1(6H)-yl)-N-butylpropanamide
CAS 1203166-53-3C18H21N3O4
2-(3-(4-Ethoxyphenyl)-2-oxoimidazolidin-1-yl)-N-(furan-2-ylmethyl)acetamide
CAS 1257549-90-8C18H21N3O4
2-((2,2-Dimethyl-2,3-dihydrobenzofuran-7-yl)oxy)-1-(3-(3-methyl-1,2,4-oxadiazol-5-yl)azetidin-1-yl)ethanone
CAS 1286718-66-8C18H21N3O4
![6-{[(6-Oxo-3-phenylpyridazin-1(6H)-yl)acetyl]amino}hexanoic acid chemical structure, C18H21N3O4, CAS 1232796-36-9](/s/VMRPOJPQLRCTPC-UHFFFAOYSA-N.svg)
6-{[(6-Oxo-3-phenylpyridazin-1(6H)-yl)acetyl]amino}hexanoic acid
CAS 1232796-36-9C18H21N3O4
![Methyl {1-[(1-oxophthalazin-2(1H)-yl)acetyl]piperidin-4-yl}acetate chemical structure, C18H21N3O4, CAS 1282124-51-9](/s/GZGOORBWMHIBMZ-UHFFFAOYSA-N.svg)
Methyl {1-[(1-oxophthalazin-2(1H)-yl)acetyl]piperidin-4-yl}acetate
CAS 1282124-51-9C18H21N3O4
- Methyl {1-[(3-methyl-4-oxo-3,4-dihydrophthalazin-1-yl)carbonyl]piperidin-4-yl}acetate1374518-54-3C18H21N3O4
- N-[1-(2-Methoxyethyl)-1H-indol-4-yl]-3-(3-methoxy-1,2-oxazol-5-yl)propanamide1401591-13-6C18H21N3O4
- (E)-3-(3,4-Dimethoxyphenyl)-N-(2-(3-methyl-6-oxopyridazin-1(6H)-yl)ethyl)acrylamide1421587-39-4C18H21N3O4
- 3-(5-Methylisoxazole-3-carboxamido)cyclohexyl phenylcarbamate1351608-16-6C18H21N3O4
- 2-(Benzyloxy)-1-(3-((6-methoxypyrazin-2-yl)oxy)pyrrolidin-1-yl)ethanone2034399-26-1C18H21N3O4
- 1-(1-(Benzyloxycarbonyl)piperidin-4-yl)-5-methyl-1H-pyrazole-4-carboxylic acid2580220-57-9C18H21N3O4
- 2-Amino-4,4'-bis[(ethoxycarbonyl)amino]-1,1'-biphenyl71857-96-0C18H21N3O4
- 4-[(4-Methyl-2-morpholin-4-ylquinolin-6-yl)amino]-4-oxobutanoic acid685521-81-7C18H21N3O4
- Methyl 3-[2-(4-methylpiperidin-1-yl)-2-oxoethyl]-4-oxo-3,4-dihydroquinazoline-7-carboxylate923219-91-4C18H21N3O4
- 1-(1-(4-Ethoxyphenyl)-5-oxopyrrolidin-3-yl)-3-(furan-2-ylmethyl)urea894014-40-5C18H21N3O4
- N1-(2-(furan-2-yl)-2-(indolin-1-yl)ethyl)-N2-(2-hydroxyethyl)oxalamide898432-88-7C18H21N3O4
- 5-[4-(1H-Indol-3-ylcarbonyl)piperazin-1-yl]-5-oxopentanoic acid1081114-64-8C18H21N3O4
- Ethyl {4-[(1-methyl-1H-indol-3-yl)carbonyl]piperazin-1-yl}(oxo)acetate1144497-11-9C18H21N3O4
- 1-(4-Methoxybenzoyl)-N-(5-methylisoxazol-3-yl)piperidine-4-carboxamide1226445-45-9C18H21N3O4
- Pyridin-4-ylmethyl-(4-pyrrolidin-1-YL-phenyl)-amine oxalate1185303-59-6C18H21N3O4
- N-(Cyanomethyl)-2-(3-methoxypropyl)-1,3-dioxo-N-propyl-2,3-dihydro-1H-isoindole-5-carboxamide1197905-39-7C18H21N3O4
- Methyl 6-(3,4-dimethoxyphenyl)-2-(1-pyrrolidinyl)-4-pyrimidinecarboxylate1215358-03-4C18H21N3O4
- Methyl 2-(3,4-dimethoxyphenyl)-6-(1-pyrrolidinyl)-4-pyrimidinecarboxylate1215358-08-9C18H21N3O4
- Defluoro levofloxacin-d31329836-14-7C18H21N3O4
- N-[2-(2-Methoxyphenyl)ethyl]-1-(5-methyl-1,2-oxazole-3-carbonyl)azetidine-3-carboxamide1351597-63-1C18H21N3O4
- 5-Cyclopropyl-N-((1-(furan-3-carbonyl)piperidin-4-yl)methyl)isoxazole-3-carboxamide1396814-72-4C18H21N3O4
- 1-(3-Methoxyphenyl)-N-(2-(3-methylisoxazol-5-yl)ethyl)-5-oxopyrrolidine-3-carboxamide1421459-31-5C18H21N3O4
- (3,4-Dimethoxyphenyl)(4-(pyrazin-2-yloxy)piperidin-1-yl)methanone1421475-05-9C18H21N3O4
- 2-(2-Methoxyphenoxy)-1-(4-(pyrazin-2-yloxy)piperidin-1-yl)ethanone1421529-63-6C18H21N3O4
- 2-(2-Methoxyphenoxy)-1-(4-(pyridazin-3-yloxy)piperidin-1-yl)ethanone1797062-76-0C18H21N3O4
- 1-(Benzo[d][1,3]dioxol-5-yl)-3-(2-(4-(dimethylamino)phenyl)-2-hydroxyethyl)urea1421512-30-2C18H21N3O4
- (E)-N-((1-(3-(Furan-2-yl)acryloyl)piperidin-4-yl)methyl)-5-methylisoxazole-4-carboxamide1428382-17-5C18H21N3O4
- (E)-3-(3,4-Dimethoxyphenyl)-N-(1-(tetrahydrofuran-3-yl)-1H-pyrazol-4-yl)acrylamide1798422-20-4C18H21N3O4
- N1-(2-(2-hydroxyethoxy)-2-(p-tolyl)ethyl)-N2-(pyridin-3-yl)oxalamide1790196-11-0C18H21N3O4
- Methyl 1-[1-(3-methylphenyl)-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl]piperidine-4-carboxylate906153-75-1C18H21N3O4
- N1-(furan-2-ylmethyl)-N2-(2-hydroxy-2-(1-methylindolin-5-yl)ethyl)oxalamide1705270-67-2C18H21N3O4
- Methyl 4-((1-((tetrahydro-2H-pyran-4-yl)methyl)-1H-pyrazol-4-yl)carbamoyl)benzoate1704528-89-1C18H21N3O4
- N-(1-((Tetrahydro-2H-pyran-4-yl)methyl)-1H-pyrazol-4-yl)-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide1705884-98-5C18H21N3O4
- 2-(Benzo[d][1,3]dioxol-5-yl)-N-(1-((tetrahydro-2H-pyran-4-yl)methyl)-1H-pyrazol-4-yl)acetamide1705351-47-8C18H21N3O4
- 2-(3,4-Dimethoxyphenyl)-1-(3-(pyrazin-2-yloxy)pyrrolidin-1-yl)ethanone2034321-16-7C18H21N3O4
- (2-Ethoxyphenyl)(3-((3-methoxypyrazin-2-yl)oxy)pyrrolidin-1-yl)methanone2034253-28-4C18H21N3O4
- 1-{3-[(3-Methoxypyrazin-2-yl)oxy]pyrrolidin-1-yl}-2-phenoxypropan-1-one2034398-58-6C18H21N3O4
- 1-(3-((3-Methoxypyrazin-2-yl)oxy)pyrrolidin-1-yl)-2-(p-tolyloxy)ethanone2034208-00-7C18H21N3O4
- 2-(3-Methoxyphenyl)-1-(3-((3-methoxypyrazin-2-yl)oxy)pyrrolidin-1-yl)ethanone2034253-95-5C18H21N3O4
- 2-(Benzyloxy)-1-(3-((3-methoxypyrazin-2-yl)oxy)pyrrolidin-1-yl)ethanone2034578-82-8C18H21N3O4
- (2-Ethoxyphenyl)(3-((6-methoxypyrazin-2-yl)oxy)pyrrolidin-1-yl)methanone2034323-10-7C18H21N3O4
- 1-(3-((6-Methoxypyrazin-2-yl)oxy)pyrrolidin-1-yl)-2-(o-tolyloxy)ethanone2034285-64-6C18H21N3O4
- 1-(3-((6-Methoxypyrazin-2-yl)oxy)pyrrolidin-1-yl)-2-(m-tolyloxy)ethanone2034333-92-9C18H21N3O4
- (3,5-Dimethoxyphenyl)(3-((6-methylpyridazin-3-yl)oxy)pyrrolidin-1-yl)methanone2034452-46-3C18H21N3O4
- 1-{3-[(6-Methoxypyridazin-3-yl)oxy]pyrrolidin-1-yl}-2-phenoxypropan-1-one2034445-24-2C18H21N3O4
- 1-(3-((6-Methoxypyridazin-3-yl)oxy)pyrrolidin-1-yl)-2-(o-tolyloxy)ethanone2034582-19-7C18H21N3O4
- 1-(3-((6-Methoxypyridazin-3-yl)oxy)pyrrolidin-1-yl)-2-(p-tolyloxy)ethanone2034223-70-4C18H21N3O4
- 2-(3-Methoxyphenyl)-1-(3-((6-methoxypyridazin-3-yl)oxy)pyrrolidin-1-yl)ethanone2034502-82-2C18H21N3O4
- 2-(Benzyloxy)-1-(3-((6-methoxypyridazin-3-yl)oxy)pyrrolidin-1-yl)ethanone2034436-18-3C18H21N3O4
- (2,3-Dimethoxyphenyl)(3-(pyridazin-3-yloxy)piperidin-1-yl)methanone2034480-21-0C18H21N3O4
- 2-(2-Methoxyphenoxy)-1-(3-(pyridazin-3-yloxy)piperidin-1-yl)ethanone2034484-23-4C18H21N3O4
- 2-(3-Methoxyphenoxy)-1-[3-(pyrazin-2-yloxy)piperidin-1-yl]ethan-1-one2034227-23-9C18H21N3O4
- 3-(1-(Tetrahydrofuran-3-carbonyl)piperidin-4-yl)quinazoline-2,4(1H,3H)-dione2034458-93-8C18H21N3O4
- 6-((Tetrahydro-2H-pyran-4-yl)oxy)-N-(4,5,6,7-tetrahydrobenzo[c]isoxazol-3-yl)nicotinamide2034361-97-0C18H21N3O4
- 4-Acetamido-N-(2-(4-methoxy-6-methyl-2-oxopyridin-1(2H)-yl)ethyl)benzamide2034267-23-5C18H21N3O4
- 2-(1-(2-(3,5-Dimethylisoxazol-4-yl)acetyl)azetidin-3-yl)-3a,4,7,7a-tetrahydro-1H-isoindole-1,3(2H)-dione1904317-44-7C18H21N3O4
- N-(2-Hydroxy-2-(pyridin-2-yl)ethyl)-6-((tetrahydro-2H-pyran-4-yl)oxy)nicotinamide1903337-55-2C18H21N3O4
- N-((2-Methoxypyridin-3-yl)methyl)-2-((tetrahydro-2H-pyran-4-yl)oxy)isonicotinamide2034277-52-4C18H21N3O4
- N-(2-Hydroxy-2-(pyridin-2-yl)ethyl)-2-((tetrahydro-2H-pyran-4-yl)oxy)isonicotinamide2034392-42-0C18H21N3O4
- 3-(1-(Tetrahydrofuran-2-carbonyl)piperidin-4-yl)quinazoline-2,4(1H,3H)-dione1904372-37-7C18H21N3O4
- N-[(2-Ethoxypyridin-3-yl)methyl]-7-methoxy-5-oxo-1,2,3,5-tetrahydroindolizine-8-carboxamide2034280-58-3C18H21N3O4
- (3-Benzylamino-4-nitro-phenyl)-carbamic acid tert-butyl ester1660118-86-4C18H21N3O4
- (R)-2-(3-(2-Ethoxyphenoxy)piperidin-1-yl)pyrimidine-5-carboxylic acid1809064-89-8C18H21N3O4
- Methyl 4-((1-((tetrahydro-2H-pyran-2-yl)methyl)-1H-pyrazol-4-yl)carbamoyl)benzoate2034380-75-9C18H21N3O4
- N-(1-((Tetrahydro-2H-pyran-2-yl)methyl)-1H-pyrazol-4-yl)-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide2034321-66-7C18H21N3O4
- N-((2-Methoxypyridin-3-yl)methyl)-6-((tetrahydrofuran-2-yl)methoxy)nicotinamide2034444-79-4C18H21N3O4
- N-(2-(4-Cyclopropyl-6-oxopyrimidin-1(6H)-yl)ethyl)-2,3-dimethoxybenzamide2034356-09-5C18H21N3O4
- N-(2-(4-Cyclopropyl-6-oxopyrimidin-1(6H)-yl)ethyl)-2-(2-methoxyphenoxy)acetamide2034394-65-3C18H21N3O4
- 2-(Benzo[d][1,3]dioxol-5-yl)-N-(1-((tetrahydro-2H-pyran-2-yl)methyl)-1H-pyrazol-4-yl)acetamide2034612-41-2C18H21N3O4
- N-((2-Methoxypyridin-4-yl)methyl)-6-((tetrahydrofuran-2-yl)methoxy)nicotinamide2034313-33-0C18H21N3O4
- 4-Oxo-4-phenyl-N-((3-(tetrahydro-2H-pyran-4-yl)-1,2,4-oxadiazol-5-yl)methyl)butanamide2034462-20-7C18H21N3O4
- 1-Cyclopropyl-4-((1-(3,5-dimethylisoxazole-4-carbonyl)azetidin-3-yl)oxy)-6-methylpyridin-2(1H)-one2329315-77-5C18H21N3O4
- Ethyl 1-[4-nitro-2-(1H-pyrrol-1-yl)-phenyl]piperidine-4-carboxylate1992986-10-3C18H21N3O4
- (2,3-Dimethoxyphenyl)(3-(pyrimidin-2-yloxy)piperidin-1-yl)methanone2034498-22-9C18H21N3O4
- (E)-3-(3-Methoxyphenyl)-N-((3-(tetrahydro-2H-pyran-4-yl)-1,2,4-oxadiazol-5-yl)methyl)acrylamide2034997-89-0C18H21N3O4
- 2-(3-Cyclopropyl-6-oxopyridazin-1(6H)-yl)-N-(2,4-dimethoxybenzyl)acetamide2034313-48-7C18H21N3O4
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 6-[2-(2,6-Dimethylmorpholino)-2-oxoethoxy]-2-phenyl-3(2H)-pyridazinone, N-[3-[(3,5-Dimethoxybenzoyl)amino]propyl]pyridine-4-carboxamide, N-{2-[(3,4-Dimethoxybenzoyl)amino]ethyl}-6-methylnicotinamide. 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.