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 101 to 200 of 343 compounds

6-(3-(4-Methoxyphenyl)azepane-1-carbonyl)pyridazin-3(2H)-one

CAS 1797726-74-9C₁₈H₂₁N₃O₃

N-(2-(Benzofuran-2-yl)-2-hydroxypropyl)-1,3,5-trimethyl-1H-pyrazole-4-carboxamide

CAS 2034277-70-6C₁₈H₂₁N₃O₃

N-((2,3-Dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-2-methyl-4,5,6,7-tetrahydro-1H-benzo[d]imidazole-5-carboxamide

CAS 2034576-91-3C₁₈H₂₁N₃O₃

3-(1-Oxo-6-(piperidin-4-yl)isoindolin-2-yl)piperidine-2,6-dione

CAS 2759952-99-1C₁₈H₂₁N₃O₃

N-{4-[(Diethylamino)methyl]phenyl}-2-nitrobenzamide

CAS 708230-14-2C₁₈H₂₁N₃O₃

5-(2,6-Dimethylmorpholin-4-yl)-2-(4-ethoxyphenyl)-1,3-oxazole-4-carbonitrile

CAS 613669-74-2C₁₈H₂₁N₃O₃

N-[2-[(4-Propan-2-yloxybenzoyl)amino]ethyl]pyridine-2-carboxamide

CAS 876881-94-6C₁₈H₂₁N₃O₃

N-[2-[(4-Propan-2-yloxybenzoyl)amino]ethyl]pyridine-4-carboxamide

CAS 876882-04-1C₁₈H₂₁N₃O₃

N-[2-[(3-Propoxybenzoyl)amino]ethyl]pyridine-4-carboxamide

CAS 876881-89-9C₁₈H₂₁N₃O₃

N-{2-[(3-Propoxybenzoyl)amino]ethyl}nicotinamide

CAS 876881-84-4C₁₈H₂₁N₃O₃

N-[4-[4-(Furan-2-carbonyl)piperazin-1-yl]phenyl]propanamide

CAS 839692-75-0C₁₈H₂₁N₃O₃

1-[3-(Furan-2-yl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(2-hydroxyethylamino)ethanone

CAS 868213-34-7C₁₈H₂₁N₃O₃

N-[(E)-[4-(Diethylamino)phenyl]methylideneamino]-2,4-dihydroxybenzamide

CAS 304665-62-1C₁₈H₂₁N₃O₃

(Z)-3-(1,3-Benzodioxol-5-yl)-N-methoxy-1,6,6-trimethyl-5,7-dihydroindazol-4-imine

CAS 1024896-60-3C₁₈H₂₁N₃O₃

N-{3-[(2-Methoxybenzoyl)amino]propyl}-6-methylnicotinamide

CAS 879033-73-5C₁₈H₂₁N₃O₃

2-(2-Methyl-1H-indol-3-yl)-2-oxo-N-[3-(2-oxopyrrolidin-1-yl)propyl]acetamide

CAS 852369-02-9C₁₈H₂₁N₃O₃

6-(2-Methoxyphenyl)-2-(2-oxo-2-piperidin-1-ylethyl)pyridazin-3-one

CAS 922929-21-3C₁₈H₂₁N₃O₃

6-(Benzo[d][1,3]dioxol-5-yl)-2-(2-(piperidin-1-yl)ethyl)pyridazin-3(2H)-one

CAS 922881-12-7C₁₈H₂₁N₃O₃

N-Cyclopentyl-2-(3-(3-methoxyphenyl)-6-oxopyridazin-1(6H)-yl)acetamide

CAS 922995-18-4C₁₈H₂₁N₃O₃

(6-Morpholin-4-yl-4-o-tolyl-pyridin-3-yl)-carbamic acid methyl ester

CAS 342417-07-6C₁₈H₂₁N₃O₃

[(1-Cyano-1,2-dimethylpropyl)carbamoyl]methyl 1-methyl-1H-indole-3-carboxylate

CAS 871310-05-3C₁₈H₂₁N₃O₃

$N'-Cyclopentyl-N-{11-oxo-1-azatricyclo[6.3.1.0^{4,12}]dodeca-4(12),5,7-trien-6-yl}ethanediamide chemical structure, C18H21N3O3, CAS 898418-89-8$

N'-Cyclopentyl-N-{11-oxo-1-azatricyclo[6.3.1.0^{4,12}]dodeca-4(12),5,7-trien-6-yl}ethanediamide

CAS 898418-89-8C₁₈H₂₁N₃O₃

4-(2-Methylphenyl)-6-[(oxolan-2-yl)methyl]-1H,2H,3H,4H,5H,6H,7H-pyrrolo[3,4-d]pyrimidine-2,5-dione

CAS 941873-01-4C₁₈H₂₁N₃O₃

N-[2-(4-Propionyl-1-piperazinyl)phenyl]-2-furamide

CAS 900764-98-9C₁₈H₂₁N₃O₃

Frequently asked questions

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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 6-(3-(4-Methoxyphenyl)azepane-1-carbonyl)pyridazin-3(2H)-one, N-(2-(Benzofuran-2-yl)-2-hydroxypropyl)-1,3,5-trimethyl-1H-pyrazole-4-carboxamide, N-((2,3-Dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-2-methyl-4,5,6,7-tetrahydro-1H-benzo[d]imidazole-5-carboxamide. 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.