Molecular formula
C21H21NO3
253 compounds have this formula on CompoundList.
- Molar mass
- 335.40g/mol
- Monoisotopic mass
- 335.1521Da
- Atoms
- 46
- Elements
- 4
- Rings plus double bonds
- 12
The formula C21H21NO3 describes a molecule made of 21 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom 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 × 2175.20%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 216.31%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 14.18%14.007 × 1 = 14.007 g/mol
- O Oxygen × 314.31%15.999 × 3 = 47.997 g/mol
Look up another formula
Compounds with the formula C21H21NO3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 253 compounds
Benzenemethanamine, alpha-phenyl-, 2-methoxybenzoate
CAS 171507-30-5C21H21NO3
![Methyl 6-methyl-2-[4-(propan-2-yloxy)phenyl]quinoline-4-carboxylate chemical structure, C21H21NO3, CAS 588692-16-4](/s/JAIXXYWCLPDQKO-UHFFFAOYSA-N.svg)
Methyl 6-methyl-2-[4-(propan-2-yloxy)phenyl]quinoline-4-carboxylate
CAS 588692-16-4C21H21NO3
![N-(2,5-Dimethylphenyl)-5-[(4-methylphenoxy)methyl]furan-2-carboxamide chemical structure, C21H21NO3, CAS 862387-03-9](/s/QAPDIEJSYYAEON-UHFFFAOYSA-N.svg)
N-(2,5-Dimethylphenyl)-5-[(4-methylphenoxy)methyl]furan-2-carboxamide
CAS 862387-03-9C21H21NO3
N-(8-Methyl-4-oxo-3-phenyl-4H-chromen-2-yl)pentanamide
CAS 879564-70-2C21H21NO3
N,N-Diethyl-3-methyl-4-oxo-2-phenyl-4H-1-benzopyran-8-carboxamide
CAS 90101-88-5C21H21NO3
![Ethyl 2-benzyl-1,3-dimethyl-6-oxo-2,6-dihydrocyclohepta[c]pyrrole-5-carboxylate chemical structure, C21H21NO3, CAS 940994-88-7](/s/QZOQZCHGGTWNCY-UHFFFAOYSA-N.svg)
Ethyl 2-benzyl-1,3-dimethyl-6-oxo-2,6-dihydrocyclohepta[c]pyrrole-5-carboxylate
CAS 940994-88-7C21H21NO3
![N-(4-Methoxyphenyl)-3-[5-(4-methylphenyl)furan-2-yl]propanamide chemical structure, C21H21NO3, CAS 923175-00-2](/s/WKZNDIGFNBVLHO-UHFFFAOYSA-N.svg)
N-(4-Methoxyphenyl)-3-[5-(4-methylphenyl)furan-2-yl]propanamide
CAS 923175-00-2C21H21NO3
![2,2-Dimethyl-N-[2-(3-methylphenyl)-4-oxo-4H-chromen-6-yl]propanamide chemical structure, C21H21NO3, CAS 923165-24-6](/s/GLHPCWXBXLGDKS-UHFFFAOYSA-N.svg)
2,2-Dimethyl-N-[2-(3-methylphenyl)-4-oxo-4H-chromen-6-yl]propanamide
CAS 923165-24-6C21H21NO3
4'-Carboethoxy-2-(3-pyrrolinomethyl) benzophenone
CAS 1017083-43-0C21H21NO3
![2-({[4-(Benzyloxy)phenyl]amino}methyl)-6-methoxyphenol chemical structure, C21H21NO3, CAS 1232777-76-2](/s/LJQQFOYABKERNT-UHFFFAOYSA-N.svg)
2-({[4-(Benzyloxy)phenyl]amino}methyl)-6-methoxyphenol
CAS 1232777-76-2C21H21NO3
N-(2-Hydroxy-2-phenylpropyl)-2-(naphthalen-2-yloxy)acetamide
CAS 1351644-53-5C21H21NO3
![7,8-Dimethoxy-3-[(E)-3-phenyl-2-propenyl]-1,3-dihydro-2H-3-benzazepin-2-one chemical structure, C21H21NO3, CAS 1574537-49-7](/s/SDWCEAJXGPTNJJ-RMKNXTFCSA-N.svg)
7,8-Dimethoxy-3-[(E)-3-phenyl-2-propenyl]-1,3-dihydro-2H-3-benzazepin-2-one
CAS 1574537-49-7C21H21NO3
(2,4-Dihydroxyquinolin-3-yl)(4-pentylphenyl)methanone
CAS 90182-30-2C21H21NO3
2-Methylpropyl 2-(4-methoxyphenyl)quinoline-4-carboxylate
CAS 355421-03-3C21H21NO3
2-(4-Butoxyphenyl)-3-methylquinoline-4-carboxylic acid
CAS 354539-58-5C21H21NO3
![9-(3,5-Dimethylphenyl)-4-ethyl-9,10-dihydro-2H,8H-chromeno[8,7-e][1,3]oxazin-2-one chemical structure, C21H21NO3, CAS 859107-93-0](/s/XCXZTCOTYMWLML-UHFFFAOYSA-N.svg)
9-(3,5-Dimethylphenyl)-4-ethyl-9,10-dihydro-2H,8H-chromeno[8,7-e][1,3]oxazin-2-one
CAS 859107-93-0C21H21NO3
![9-Benzyl-4-propyl-9,10-dihydro-2H,8H-chromeno[8,7-e][1,3]oxazin-2-one chemical structure, C21H21NO3, CAS 896838-64-5](/s/AOGGHVDARUESES-UHFFFAOYSA-N.svg)
9-Benzyl-4-propyl-9,10-dihydro-2H,8H-chromeno[8,7-e][1,3]oxazin-2-one
CAS 896838-64-5C21H21NO3
![2-[4-(Pentyloxy)phenyl]quinoline-4-carboxylic acid chemical structure, C21H21NO3, CAS 51842-71-8](/s/CHQQDLFFWYTHIB-UHFFFAOYSA-N.svg)
2-[4-(Pentyloxy)phenyl]quinoline-4-carboxylic acid
CAS 51842-71-8C21H21NO3
![9-(2,4-Dimethylphenyl)-4-ethyl-9,10-dihydro-2H,8H-chromeno[8,7-e][1,3]oxazin-2-one chemical structure, C21H21NO3, CAS 848926-00-1](/s/XZNOUYRMPFUTAW-UHFFFAOYSA-N.svg)
9-(2,4-Dimethylphenyl)-4-ethyl-9,10-dihydro-2H,8H-chromeno[8,7-e][1,3]oxazin-2-one
CAS 848926-00-1C21H21NO3
![9-(3,5-Dimethylphenyl)-3,4-dimethyl-9,10-dihydro-2H,8H-chromeno[8,7-e][1,3]oxazin-2-one chemical structure, C21H21NO3, CAS 848994-26-3](/s/FECLHZKINHTFKQ-UHFFFAOYSA-N.svg)
9-(3,5-Dimethylphenyl)-3,4-dimethyl-9,10-dihydro-2H,8H-chromeno[8,7-e][1,3]oxazin-2-one
CAS 848994-26-3C21H21NO3
![Ethyl 4-[(3-oxo-5-phenylcyclohex-1-en-1-yl)amino]benzoate chemical structure, C21H21NO3, CAS 358354-87-7](/s/UROUCYTZESGLLI-UHFFFAOYSA-N.svg)
Ethyl 4-[(3-oxo-5-phenylcyclohex-1-en-1-yl)amino]benzoate
CAS 358354-87-7C21H21NO3
![N-[4-(2-Isopropyl-5-methylphenoxy)phenyl]-2-furamide chemical structure, C21H21NO3, CAS 356093-28-2](/s/HJGRERWLLGJDHQ-UHFFFAOYSA-N.svg)
N-[4-(2-Isopropyl-5-methylphenoxy)phenyl]-2-furamide
CAS 356093-28-2C21H21NO3
![2-[4-(Benzyloxy)phenyl]hexahydro-1H-isoindole-1,3(2H)-dione chemical structure, C21H21NO3, CAS 345320-89-0](/s/LLUKAUHZYSEOJR-UHFFFAOYSA-N.svg)
2-[4-(Benzyloxy)phenyl]hexahydro-1H-isoindole-1,3(2H)-dione
CAS 345320-89-0C21H21NO3
3-Hydroxy-3-(1-oxo-3,4-dihydro-2H-naphthalen-2-yl)-1-propylindol-2-one
CAS 717836-04-9C21H21NO3
- Dibenzo(a,e)cycloheptatrien-5-one, 2-methoxy-11-morpholinomethyl-69352-74-5C21H21NO3
- 2-(4-Methoxyphenyl)-5-phenyl-3a,4,5,6,7,7a-hexahydroisoindole-1,3-dione1005273-18-6C21H21NO3
- 9-(4-Ethylphenyl)-3,4-dimethyl-9,10-dihydro-2H,8H-chromeno[8,7-e][1,3]oxazin-2-one861139-44-8C21H21NO3
- N-(Furan-3-ylmethyl)-N-(2-methoxyethyl)-[1,1'-biphenyl]-4-carboxamide1421526-82-0C21H21NO3
- 6-Fmoc-1-oxa-6-azaspiro[2.5]octane3031805-18-9C21H21NO3
- Anthraquinone, 2-methoxy-3-piperidinomethyl-69353-37-3C21H21NO3
- n-Benzyl-2-(6,7-dimethoxynaphthalen-2-yl)acetamide37707-87-2C21H21NO3
- Butyl 2-(4-methoxyphenyl)quinoline-4-carboxylate355421-32-8C21H21NO3
- 4-(Ethoxymethylidene)-2-[4-(propan-2-yl)phenyl]-1,2,3,4-tetrahydroisoquinoline-1,3-dione565168-52-7C21H21NO3
- N-[1-(2,5-Dimethoxyphenyl)ethyl]naphthalene-1-carboxamide381168-39-4C21H21NO3
- 9-(2,4-Dimethylphenyl)-3,4-dimethyl-9,10-dihydro-2H,8H-chromeno[8,7-e][1,3]oxazin-2-one862104-23-2C21H21NO3
- 5-Hydroxy-7-methyl-4-phenyl-6-(pyrrolidin-1-ylmethyl)-2H-chromen-2-one329702-82-1C21H21NO3
- 2-Amino-alpha,alpha-bis(4-methoxyphenyl)benzenemethanol91148-62-8C21H21NO3
- Benzoic acid, 5-methyl-2-[[3-(2-naphthalenyloxy)propyl]amino]-937664-35-2C21H21NO3
- Benzyl 1-(2,2-dimethylpropionyl)-1H-indole-5-carboxylate739366-10-0C21H21NO3
- 1-[2-(4-Methoxy-benzyl)-1-oxo-1,2,3,4-tetrahydro-isoquinolin-6-yl]-cyclopropanecarbaldehyde1178884-76-8C21H21NO3
- 3-Methoxy-N,N-bis(3-methoxyphenyl)aniline106614-60-2C21H21NO3
- N-[3-Hydroxy-3-(naphthalen-1-yl)propyl]-2-methoxybenzamide1421475-58-2C21H21NO3
- N-[2-(Furan-3-yl)-2-hydroxyethyl]-3,3-diphenylpropanamide1396852-58-6C21H21NO3
- N-[3-(Furan-3-yl)-3-hydroxypropyl]-2,2-diphenylacetamide1428359-55-0C21H21NO3
- N-(3-(Furan-2-yl)-2-hydroxy-2-methylpropyl)-[1,1'-biphenyl]-4-carboxamide1795190-62-3C21H21NO3
- 1'-(2,5-Dimethylbenzoyl)-3,4-dihydrospiro[1-benzopyran-2,3'-pyrrolidine]-4-one1705768-80-4C21H21NO3
- 1'-(2-(m-Tolyl)acetyl)-3H-spiro[isobenzofuran-1,4'-piperidin]-3-one1705091-28-6C21H21NO3
- N-(4-(Furan-3-yl)benzyl)-3-(4-methoxyphenyl)propanamide2034350-86-0C21H21NO3
- N-(4-(Furan-3-yl)benzyl)-4-isopropoxybenzamide2034454-86-7C21H21NO3
- 2(1H)-Quinolinone, 3-benzoyl-4-hydroxy-6-pentyl-90182-46-0C21H21NO3
- 3,4-Diethoxy-N-naphthalen-2-ylbenzamide695157-08-5C21H21NO3
- Methyl 2-(3-butoxyphenyl)-4-quinolinecarboxylate353773-58-7C21H21NO3
- Benzo[1,3]dioxol-5-ylmethyl-(2-ethoxy-naphthalen-1-ylmethyl)-amine880806-80-4C21H21NO3
- 2-Methoxy-N,N-bis(2-methoxyphenyl)aniline7287-74-3C21H21NO3
- 2-(6-Methoxy-2-naphthyl)-N-(4-methoxyphenyl)propanamide1111469-70-5C21H21NO3
- Methyl 4-[(2,5-dimethylphenyl)methoxy]-6-methylquinoline-2-carboxylate1358504-75-2C21H21NO3
- Methyl 4-((4-(morpholinomethyl)phenyl) ethynyl)benzoate1363374-76-8C21H21NO3
- 8-Ethyl-1,3,4,9-tetrahydro-1-phenylpyrano[3,4-b]indole-1-acetic acid849630-67-7C21H21NO3
- N-(2-Methoxy-2-(3-methoxyphenyl)ethyl)-1-naphthamide1797557-67-5C21H21NO3
- N-(2-Methoxy-2-(2-methoxyphenyl)ethyl)-1-naphthamide1795484-91-1C21H21NO3
- N-[2-(Furan-2-yl)-2-methoxyethyl]-2,2-diphenylacetamide1788784-08-6C21H21NO3
- N-(2-Hydroxy-3-methoxy-2-phenylpropyl)-1-naphthamide2034334-26-2C21H21NO3
- 2-(2,3-Dihydro-1,4-benzodioxine-5-carbonyl)-6-phenyl-2-azaspiro[3.3]heptane2640893-32-7C21H21NO3
- (9H-Fluoren-9-yl)methyl N-methyl-N-[2-(prop-2-yn-1-yloxy)ethyl]carbamate2150770-76-4C21H21NO3
- 4-Ethoxy-3-methoxy-N-(naphthalen-1-ylmethyl)benzamide5863-33-2C21H21NO3
- 5,5-Diphenyl-4-propan-2-yl-3-prop-2-enoyl-1,3-oxazolidin-2-one7235-55-4C21H21NO3
- Ethyl 1-(4-methoxyphenyl)-2-methyl-5-phenyl-1H-pyrrole-3-carboxylate723303-24-0C21H21NO3
- 2-Pyrrolidinone, 3-acetyl-3-(2-oxo-2-phenylethyl)-1-(phenylmethyl)-654058-45-4C21H21NO3
- 2-[2-(2,4-Dimethylphenoxy)ethoxy]-1-naphthalenecarboxaldehyde oxime938267-74-4C21H21NO3
- 2-[1-(Benzyloxy)hex-5-en-2-yl]-1H-isoindole-1,3(2H)-dione126550-69-4C21H21NO3
- N-Benzyl-1-hydroxy-N-(2-methoxyethyl)-2-naphthamide1110894-16-0C21H21NO3
- 1-(2-Hydroxynaphth-1-yl)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline897035-07-3C21H21NO3
- 1-(1-Hydroxynaphth-2-yl)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline897035-11-9C21H21NO3
- tert-Butyl 3-benzyl-4-formyl-1H-indole-1-carboxylate920454-64-4C21H21NO3
- (9H-Fluoren-9-yl)methyl 2-methyl-4-oxopiperidine-1-carboxylate1312455-94-9C21H21NO3
- 3-{3-[2-(5-Methyl-2-phenyl-1,3-oxazol-4-yl)ethoxy]phenyl}propanal585569-22-8C21H21NO3
- Benzyl 3-oxo-2,3-dihydrospiro[indene-1,4'-piperidine]-1'-carboxylate878167-49-8C21H21NO3
- (9H-Fluoren-9-yl)methyl 3-cyclopropyl-3-hydroxyazetidine-1-carboxylate1481300-08-6C21H21NO3
- 6-Methoxy-2-[4-[(tetrahydro-2H-pyran-2-yl)oxy]phenyl]quinoline1401819-45-1C21H21NO3
- 4-Methoxy-8-[4-[(tetrahydro-2H-pyran-2-yl)oxy]phenyl]quinoline1401818-92-5C21H21NO3
- 1-[3-([1,1'-Biphenyl]-4-yl)acryloyl]piperidine-3-carboxylic acid649748-57-2C21H21NO3
- 4-((5-(3-Methoxyphenyl)pentyl)oxy)benzofuran-7-carbonitrile1820856-35-6C21H21NO3
- (9H-Fluoren-9-yl)methyl (2-(3-oxocyclobutyl)ethyl)carbamate2098051-21-7C21H21NO3
- N-[(1-Hydroxycyclohex-2-en-1-yl)methyl]-9H-xanthene-9-carboxamide2097871-93-5C21H21NO3
- Ethyl 7-benzyl-1-ethyl-4-oxo-1,4-dihydroquinoline-3-carboxylate24796-11-0C21H21NO3
- 4-Benzyl-5,7-dimethoxy-6-methyl-1,4-dihydrocyclopenta[b]indol-3(2H)-one71554-50-2C21H21NO3
- 1-(7,9-Diacetyl-11-methyl-6H-azepino[1,2-a]indol-6-yl)propan-2-one2360459-30-7C21H21NO3
- 1-(2-Ethoxy-3,4-dihydro-4-phenylpyrano[2,3-b]indol-9(2H)-yl)ethanone15295-79-1C21H21NO3
- 1'-Benzyl-2H-spiro[benzo[2,1-b:3,4-c']difuran-3,4'-piperidin]-6(8H)-one2961390-70-3C21H21NO3
- 4-[[4-(Pentyloxy)phenyl]methylene]-2-phenyl-5(4H)-oxazolone296272-09-8C21H21NO3
- (4Z)-4-(Ethoxymethylidene)-2-(4-propan-2-ylphenyl)isoquinoline-1,3-dioneC21H21NO3
- 4-Oxo-2-(4-pentylphenyl)-1,4-dihydroquinoline-6-carboxylic acid90034-34-7C21H21NO3
- (4-(Bis(4-methoxyphenyl)amino)phenyl)methanol392662-43-0C21H21NO3
- N-(3,5-Dimethoxybenzyl)-2-phenoxyaniline932698-43-6C21H21NO3
- 4-Cyanophenyl 4-[(hept-6-en-1-yl)oxy]benzoate116352-70-6C21H21NO3
- 4-Butoxy-1-hydroxy-N-phenylnaphthalene-2-carboxamide500572-59-8C21H21NO3
- 4-Cyanophenyl 3-(4-butoxyphenyl)-2-methylprop-2-enoate60753-65-3C21H21NO3
- 4-(Pentyloxy)phenyl 3-(4-cyanophenyl)prop-2-enoate61924-40-1C21H21NO3
- 4-Butylphenyl 2-cyano-3-(4-methoxyphenyl)prop-2-enoate61478-69-1C21H21NO3
- 7-Cyclohexyl-2-(4-methoxyphenyl)-4H-1,3-benzoxazin-4-one830328-69-3C21H21NO3
Frequently asked questions
What is the molar mass of C21H21NO3?
The molar mass of C21H21NO3 is 335.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 3 oxygen atoms. The monoisotopic mass is 335.1521 Da.
How many compounds have the formula C21H21NO3?
CompoundList lists 253 compounds with the molecular formula C21H21NO3, including Benzenemethanamine, alpha-phenyl-, 2-methoxybenzoate, Methyl 6-methyl-2-[4-(propan-2-yloxy)phenyl]quinoline-4-carboxylate, N-(2,5-Dimethylphenyl)-5-[(4-methylphenoxy)methyl]furan-2-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 C21H21NO3?
C21H21NO3 has a degree of unsaturation of 12. 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.