Molecular formula

C₂₁H₂₀ClN₃O₃

138 compounds have this formula on CompoundList.

Molar mass: 397.86g/mol
Monoisotopic mass: 397.1193Da
Atoms: 48
Elements: 5
Rings plus double bonds: 13

The formula C21H20ClN3O3 describes a molecule made of 21 carbon atoms, 20 hydrogen atoms, 1 chlorine atom, 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 × 2163.40%
12.011 × 21 = 252.231 g/mol
H Hydrogen × 205.07%
1.008 × 20 = 20.160 g/mol
Cl Chlorine × 18.91%
35.45 × 1 = 35.450 g/mol
N Nitrogen × 310.56%
14.007 × 3 = 42.021 g/mol
O Oxygen × 312.06%
15.999 × 3 = 47.997 g/mol

Look up another formula

Compounds with the formula C21H20ClN3O3

Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.

Showing 1 to 100 of 138 compounds

6-(4-Chloro-3-nitrophenyl)-9,9-dimethyl-6,8,10,11-tetrahydro-5H-benzo[b][1,4]benzodiazepin-7-one

CAS 330208-59-8C₂₁H₂₀ClN₃O₃

2-[4-(4-Chlorophenyl)-1-oxophthalazin-2-yl]-N-(oxolan-2-ylmethyl)acetamide

CAS 684234-82-0C₂₁H₂₀ClN₃O₃

(5-(4-Chlorophenyl)isoxazol-3-yl)(4-(2-methoxyphenyl)piperazin-1-yl)methanone

CAS 909856-46-8C₂₁H₂₀ClN₃O₃

3-(2-Chlorophenyl)-5-methyl-N-[4-(morpholin-4-yl)phenyl]-1,2-oxazole-4-carboxamide

CAS 749913-80-2C₂₁H₂₀ClN₃O₃

$N'-[2-(4-Chlorophenyl)ethyl]-N-{2-oxo-1-azatricyclo[6.3.1.0^{4,12}]dodeca-4,6,8(12)-trien-6-yl}ethanediamide chemical structure, C21H20ClN3O3, CAS 898454-69-8$

N'-[2-(4-Chlorophenyl)ethyl]-N-{2-oxo-1-azatricyclo[6.3.1.0^{4,12}]dodeca-4,6,8(12)-trien-6-yl}ethanediamide

CAS 898454-69-8C₂₁H₂₀ClN₃O₃

N-(2-Chloro-4-methylphenyl)-2-(2,5-dioxo-3',4'-dihydro-2'H-spiro[imidazolidine-4,1'-naphthalen]-1-yl)acetamide

CAS 875913-47-6C₂₁H₂₀ClN₃O₃

3-(2-Chlorophenyl)-5-methyl-N-[2-(propan-2-ylcarbamoyl)phenyl]-1,2-oxazole-4-carboxamide

CAS 827617-15-2C₂₁H₂₀ClN₃O₃

3-(4-Benzoylpiperazin-1-yl)-1-(3-chlorophenyl)pyrrolidine-2,5-dione

CAS 313482-78-9C₂₁H₂₀ClN₃O₃

2-Chloro-N-(3-{2-cyano-2-[(3-methoxypropyl)carbamoyl]eth-1-en-1-yl}phenyl)benzamide

CAS 1164472-54-1C₂₁H₂₀ClN₃O₃

2-{5-[(4-Chlorophenoxy)methyl]furan-2-yl}-5-(4-methylpiperidin-1-yl)-1,3-oxazole-4-carbonitrile

CAS 931704-47-1C₂₁H₂₀ClN₃O₃

Ripk1-IN-13

CAS 1574547-67-3C₂₁H₂₀ClN₃O₃

Isopropyl 4-({4-[(4-chloro-1H-pyrazol-1-yl)methyl]benzoyl}amino)benzoate

CAS 514817-08-4C₂₁H₂₀ClN₃O₃

2-(4-(3-Chlorophenyl)-2,3-dioxo-3,4-dihydropyrazin-1(2H)-yl)-N-mesitylacetamide

CAS 904524-51-2C₂₁H₂₀ClN₃O₃

2-[4-[(4-Chlorophenyl)methyl]-2,3-dioxopyrazin-1-yl]-N-(3,5-dimethylphenyl)acetamide

CAS 904525-38-8C₂₁H₂₀ClN₃O₃

N-(5-Chloro-2-cyanophenyl)-N'-[(4-phenyloxan-4-yl)methyl]ethanediamide

CAS 1091080-91-9C₂₁H₂₀ClN₃O₃

N-(3-Chloro-4-methoxyphenyl)-3-(morpholine-4-carbonyl)quinolin-4-amine

CAS 1040676-86-5C₂₁H₂₀ClN₃O₃

N-(5-Chloro-2-methoxyphenyl)-2-[3-(2,5-dimethylphenyl)-6-oxopyridazin-1-yl]acetamide

CAS 941973-54-2C₂₁H₂₀ClN₃O₃

N1-(3-chloro-2-methylphenyl)-N2-(3-oxo-1,2,3,5,6,7-hexahydropyrido[3,2,1-ij]quinolin-9-yl)oxalamide

CAS 898464-52-3C₂₁H₂₀ClN₃O₃

N'-(2-Chlorophenyl)-N-(1-cyclopropanecarbonyl-1,2,3,4-tetrahydroquinolin-7-yl)ethanediamide

CAS 903261-26-7C₂₁H₂₀ClN₃O₃

Erlotinib impurity A

CAS 183321-85-9C₂₁H₂₀ClN₃O₃

Ethyl 2-{2-[1-(3-chlorophenyl)-5-oxopyrrolidin-3-yl]-1H-1,3-benzodiazol-1-yl}acetate

CAS 890642-00-9C₂₁H₂₀ClN₃O₃

9-(4-Chlorophenyl)-2-(4-methoxyphenyl)hexahydro-1H-pyrazolo[1,2-a]pyrrolo[3,4-c]pyrazole-1,3(2H)-dione

CAS 473576-99-7C₂₁H₂₀ClN₃O₃

Ethyl {2-[1-(4-chlorophenyl)-5-oxopyrrolidin-3-yl]-1H-benzimidazol-1-yl}acetate

CAS 890643-49-9C₂₁H₂₀ClN₃O₃

2-Amino-4-(4-chlorophenyl)-7-methyl-5-oxo-6-((tetrahydrofuran-2-yl)methyl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile

CAS 712295-88-0C₂₁H₂₀ClN₃O₃

Frequently asked questions

Still have a question?

The help centre explains buying, quotes and supplier badges step by step, or you can write to our team.

Help centre Contact us

What is the molar mass of C21H20ClN3O3?

The molar mass of C21H20ClN3O3 is 397.86 g/mol, calculated from standard atomic weights for 21 carbon atoms, 20 hydrogen atoms, 1 chlorine atom, 3 nitrogen atoms and 3 oxygen atoms. The monoisotopic mass is 397.1193 Da.

How many compounds have the formula C21H20ClN3O3?

CompoundList lists 138 compounds with the molecular formula C21H20ClN3O3, including 6-(4-Chloro-3-nitrophenyl)-9,9-dimethyl-6,8,10,11-tetrahydro-5H-benzo[b][1,4]benzodiazepin-7-one, 2-[4-(4-Chlorophenyl)-1-oxophthalazin-2-yl]-N-(oxolan-2-ylmethyl)acetamide, (5-(4-Chlorophenyl)isoxazol-3-yl)(4-(2-methoxyphenyl)piperazin-1-yl)methanone. 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 C21H20ClN3O3?

C21H20ClN3O3 has a degree of unsaturation of 13. 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.