Molecular formula
C21H18O4
115 compounds have this formula on CompoundList.
- Molar mass
- 334.37g/mol
- Monoisotopic mass
- 334.1205Da
- Atoms
- 43
- Elements
- 3
- Rings plus double bonds
- 13
The formula C21H18O4 describes a molecule made of 21 carbon atoms, 18 hydrogen 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 × 2175.43%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 185.43%1.008 × 18 = 18.144 g/mol
- O Oxygen × 419.14%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C21H18O4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 115 compounds
Psora-4
CAS 724709-68-6C21H18O4
Isopongaflavone
CAS 64125-33-3C21H18O4
3,5-Bis(phenylmethoxy)benzoic acid
CAS 28917-43-3C21H18O4
3,4-Bis(benzyloxy)benzoic acid
CAS 1570-05-4C21H18O4
Karanjachromene
CAS 38070-93-8C21H18O4
(E)-1-(4-Methoxyphenyl)-3-(5-(4-methoxyphenyl)furan-2-yl)prop-2-en-1-one
CAS 301227-63-4C21H18O4
(1,1'-Biphenyl)-4-yl 3,5-dimethoxybenzoate
CAS 354769-05-4C21H18O4
(1,1'-Biphenyl)-4-yl 3,4-dimethoxybenzoate
CAS 329219-52-5C21H18O4
Calopogoniumisoflavone A
CAS 31273-64-0C21H18O4
![6-Methyl-7-(2-oxo-2-phenylethoxy)-2,3-dihydrocyclopenta[c]chromen-4(1H)-one chemical structure, C21H18O4, CAS 307548-95-4](/s/PEIVIIUMWUHVOP-UHFFFAOYSA-N.svg)
6-Methyl-7-(2-oxo-2-phenylethoxy)-2,3-dihydrocyclopenta[c]chromen-4(1H)-one
CAS 307548-95-4C21H18O4
ME-143
CAS 852536-39-1C21H18O4
![3-(2-Oxo-2-phenylethoxy)-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one chemical structure, C21H18O4, CAS 335419-00-6](/s/FATIAOIGJIMOAN-UHFFFAOYSA-N.svg)
3-(2-Oxo-2-phenylethoxy)-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one
CAS 335419-00-6C21H18O4
3-(Benzofuran-2-yl)-6-butyl-7-hydroxy-4H-chromen-4-one
CAS 303025-43-6C21H18O4
![6-Oxo-7,8,9,10-tetrahydro-6H-benzo[c]chromen-3-yl 4-methylbenzoate chemical structure, C21H18O4, CAS 328022-51-1](/s/RUISDDYRWSGNRL-UHFFFAOYSA-N.svg)
6-Oxo-7,8,9,10-tetrahydro-6H-benzo[c]chromen-3-yl 4-methylbenzoate
CAS 328022-51-1C21H18O4
![3-(4-Methoxyphenyl)-4,8,9-trimethyl-7H-furo[2,3-f]chromen-7-one chemical structure, C21H18O4, CAS 858743-67-6](/s/DWLBKQALCXMWBH-UHFFFAOYSA-N.svg)
3-(4-Methoxyphenyl)-4,8,9-trimethyl-7H-furo[2,3-f]chromen-7-one
CAS 858743-67-6C21H18O4
3-(1-Benzofuran-2-yl)-7-methoxy-6-propyl-4H-chromen-4-one
CAS 299952-04-8C21H18O4
4-(7-Methoxy-1-benzofuran-2-yl)-6-(propan-2-yl)-2H-chromen-2-one
CAS 858766-76-4C21H18O4
Flavokawain 1i
CAS 1098176-51-2C21H18O4
4-(6-Methoxy-3-methylbenzofuran-2-yl)-7,8-dimethyl-2H-chromen-2-one
CAS 858763-73-2C21H18O4
![5-(4-Methoxyphenyl)-2,3,9-trimethyl-7H-furo[3,2-g]chromen-7-one chemical structure, C21H18O4, CAS 374768-53-3](/s/WIOCHMDORGGYEQ-UHFFFAOYSA-N.svg)
5-(4-Methoxyphenyl)-2,3,9-trimethyl-7H-furo[3,2-g]chromen-7-one
CAS 374768-53-3C21H18O4
Ethyl 3-(4-methylbenzyl)-1,4-dioxo-1,4-dihydro-2-naphthalenecarboxylate
CAS 59725-42-7C21H18O4
Bis-benzyloxy benzoic acid
CAS 74272-78-9C21H18O4
![3-(4-Methoxyphenyl)-5,6,9-trimethyl-7H-furo[3,2-g]chromen-7-one chemical structure, C21H18O4, CAS 374759-12-3](/s/HKVFZKOFJAVPOC-UHFFFAOYSA-N.svg)
3-(4-Methoxyphenyl)-5,6,9-trimethyl-7H-furo[3,2-g]chromen-7-one
CAS 374759-12-3C21H18O4
3-O-Methylanhydrotuberosin
CAS 41347-50-6C21H18O4
- 5-Ethyl-3-(4-methoxyphenyl)-9-methyl-7H-furo[3,2-g]chromen-7-one374766-35-5C21H18O4
- 9-Ethyl-3-(3-methoxyphenyl)-4-methyl-7H-furo[2,3-f]chromen-7-one670241-75-5C21H18O4
- 6-Ethyl-3-(3-methoxyphenyl)-5-methyl-7H-furo[3,2-g]chromen-7-one858749-52-7C21H18O4
- (E)-3-(3,4-Dimethoxyphenyl)-1-(1-hydroxynaphthalen-2-yl)prop-2-en-1-one125574-13-2C21H18O4
- 10-Sorbylchrysarobin127848-72-0C21H18O4
- 3-(2-Methoxyphenyl)-8-(propan-2-yl)-4H-furo[2,3-h]chromen-4-one5771-85-7C21H18O4
- 2,5-Bis(benzyloxy)benzoic acid67127-91-7C21H18O4
- 2-Hydroxy-4-(2-phenoxyethoxy)benzophenone21112-68-5C21H18O4
- (9H-Fluorene-9,9-diyl)bis(methylene) diacrylate583036-99-1C21H18O4
- 7-[2-(4-Methylphenyl)-2-oxoethoxy]-2,3-dihydrocyclopenta[c]chromen-4(1H)-one312496-58-5C21H18O4
- 7-Methyl-9-(2-oxo-2-phenylethoxy)-2,3-dihydrocyclopenta[c]chromen-4(1H)-one307549-58-2C21H18O4
- (4-Phenylmethoxyphenyl) 4-methoxybenzoate50649-79-1C21H18O4
- 7-(2-Oxocyclohexyl)oxy-4-phenylchromen-2-one314742-92-2C21H18O4
- (Z)-6-Ethoxy-2-((2-methyl-2H-chromen-3-yl)methylene)benzofuran-3(2H)-one859662-16-1C21H18O4
- 3-(4-Methoxyphenyl)-5-propyl-7H-furo[3,2-g]chromen-7-one374762-77-3C21H18O4
- 4-(7-Ethoxy-1-benzofuran-2-yl)-6-ethylchromen-2-one637753-43-6C21H18O4
- Benzyl 4-(benzyloxy)-2-hydroxybenzoate97476-06-7C21H18O4
- 4-(3-Benzyloxyphenyl)-3-methoxybenzoic acid1262006-84-7C21H18O4
- 4-(4-Benzyloxyphenyl)-3-methoxybenzoic acid167627-34-1C21H18O4
- Gnetumelin A1004321-83-8C21H18O4
- 4-(Phenoxy(phenyl)methoxy)phenyl acetate909078-67-7C21H18O4
- 4-(7-Ethoxybenzofuran-2-yl)-7,8-dimethyl-2H-chromen-2-one637752-22-8C21H18O4
- 4-(7-Ethoxybenzofuran-2-yl)-6,8-dimethyl-2H-chromen-2-one637752-20-6C21H18O4
- 4-(7-Ethoxybenzofuran-2-yl)-6,7-dimethyl-2H-chromen-2-one858770-75-9C21H18O4
- 4-(6-Methoxy-3-methylbenzofuran-2-yl)-6,8-dimethyl-2H-chromen-2-one859139-48-3C21H18O4
- 2-(3,4-Dimethylphenyl)-2-oxo-1-phenylethyl 2-furoate516467-23-5C21H18O4
- 3,4-Bis(benzyloxy)phenyl formate189082-97-1C21H18O4
- Methyl 6-(benzyloxy)-4'-hydroxy-[1,1'-biphenyl]-3-carboxylate865137-93-5C21H18O4
- 4-(4-Benzyloxyphenyl)-2-methoxybenzoic acid1261913-24-9C21H18O4
- 4-{[4-(Benzyloxy)phenoxy]methyl}benzoic acid1901991-11-4C21H18O4
- 4-(6-Methoxy-3-methyl-1-benzofuran-2-yl)-6,7-dimethylchromen-2-one637753-39-0C21H18O4
- 4-(2-Benzyloxyphenyl)-3-methoxybenzoic acid1261899-21-1C21H18O4
- 3-(2-Benzyloxyphenyl)-2-methoxybenzoic acid1261915-35-8C21H18O4
- 2-(2-Benzyloxyphenyl)-5-methoxybenzoic acid1261911-85-6C21H18O4
- 3-(2-Benzyloxyphenyl)-5-methoxybenzoic acid1261969-31-6C21H18O4
- 3-(3-Benzyloxyphenyl)-2-methoxybenzoic acid1261912-30-4C21H18O4
- 2-(3-Benzyloxyphenyl)-5-methoxybenzoic acid1261981-31-0C21H18O4
- 3-(3-Benzyloxyphenyl)-5-methoxybenzoic acid1261915-50-7C21H18O4
- 4-(3-Benzyloxyphenyl)-2-methoxybenzoic acid1261979-63-8C21H18O4
- 3-(4-Benzyloxyphenyl)-2-methoxybenzoic acid1261913-19-2C21H18O4
- 2-(4-Benzyloxyphenyl)-5-methoxybenzoic acid1261956-15-3C21H18O4
- 3-(4-Benzyloxyphenyl)-5-methoxybenzoic acid1262011-10-8C21H18O4
- Benzyl 4-(benzyloxy)-3-hydroxybenzoate263277-12-9C21H18O4
- 15H-Cyclopenta[a]phenanthrene-15,16-diol, 16,17-dihydro-, diacetate, cis-42122-92-9C21H18O4
- 4-(Ethoxycarbonyl)benzyl 1-naphthoate516469-60-6C21H18O4
- 5-Methoxy-2,2-dimethyl-8-phenyl-2H,6H-benzo(1,2-b:5,4-b')dipyran-6-one74517-64-9C21H18O4
- 4-(2-Benzyloxyphenyl)-2-methoxybenzoic acid1261996-03-5C21H18O4
- 4-Hydroxy-5-methoxy-2'-(phenylmethoxy)[1,1'-biphenyl]-3-carboxaldehyde1093120-59-2C21H18O4
- 4-Hydroxy-5-methoxy-3'-(phenylmethoxy)[1,1'-biphenyl]-3-carboxaldehyde1093120-55-8C21H18O4
- Dehydrodanshenol A1444618-61-4C21H18O4
- [(4-Methoxyphenyl)-phenylmethyl] phenyl carbonate31558-55-1C21H18O4
- 3-(3,4-Dimethoxynaphthalen-1-yl)-3-methyl-2-benzofuran-1-one10231-04-6C21H18O4
- 3-Methoxy-7-methyl-9,10,11,12-tetrahydro-5H-benzo[c][1]benzofuro[3,2-g]chromen-5-one858746-45-9C21H18O4
- 4-Hydroxy-2-(2-oxopropyl)naphthalen-1-yl 4-methylbenzoate221206-24-2C21H18O4
- 5H-Spiro[benzo[c]pyrano[3,2-g]chromene-9,1'-cyclohexane]-5,11(10H)-dione859670-64-7C21H18O4
- (E)-3-(2,3-Dimethoxyphenyl)-1-(1-hydroxynaphthalen-2-yl)prop-2-en-1-one1367707-37-6C21H18O4
- (E)-3-(2,4-Dimethoxyphenyl)-1-(1-hydroxynaphthalen-2-yl)prop-2-en-1-one1262887-86-4C21H18O4
- 2,4-Bis(benzyloxy)-6-hydroxybenzaldehyde863237-56-3C21H18O4
- Methyl 6-(benzyloxy)-3'-hydroxy-[1,1'-biphenyl]-3-carboxylate2741841-25-6C21H18O4
- 5-Ethyl-3-(3-methoxyphenyl)-9-methyl-7H-furo[3,2-g]chromen-7-one500204-92-2C21H18O4
- 2-(Methacryloyloxy)ethyl anthracene-9-carboxylate189390-61-2C21H18O4
- [4-(Benzyloxy)phenyl](2-hydroxy-4-methoxyphenyl)methanone923017-19-0C21H18O4
- 3-Acetyl-5-(diphenylmethyl)-4-hydroxy-6-methyl-2H-pyran-2-one88239-34-3C21H18O4
- 6,8-Dimethoxy-3-methyl-1,2-dihydrotetraphene-7,12-dione88165-37-1C21H18O4
- 1,4-Dimethyl 2-(2,3-diphenyl-2-cyclopropen-1-ylidene)butanedioate1669-47-2C21H18O4
- Benzoic acid, 2-((4-methoxyphenyl)phenylmethoxy)-72417-81-3C21H18O4
- 6-Ethyl-3-(4-methoxyphenyl)-5-methyl-7H-furo[3,2-g]chromen-7-one858742-22-0C21H18O4
- 3-(3-Methoxyphenyl)-4,8,9-trimethyl-7H-furo[2,3-f]chromen-7-one858749-64-1C21H18O4
- 3-(3-Methoxyphenyl)-5,6,9-trimethyl-7H-furo[3,2-g]chromen-7-one858749-84-5C21H18O4
- 3-(3-Methoxyphenyl)-5-propyl-7H-furo[3,2-g]chromen-7-one858750-28-4C21H18O4
- Acetic acid, [(2-benzoyl-1-naphthalenyl)oxy]-, ethyl ester833485-56-6C21H18O4
- Acetic acid, [(1-benzoyl-2-naphthalenyl)oxy]-, ethyl ester94866-93-0C21H18O4
- 2-[(4-Hydroxy-3-methoxyphenyl)(phenyl)methyl]benzoic acid4366-05-6C21H18O4
- 3,4-Bis(benzyloxy)-5-hydroxybenzaldehyde143592-84-1C21H18O4
- 4-(Benzyloxy)-2'-methoxy-[1,1'-biphenyl]-3-carboxylic acid1208239-16-0C21H18O4
- {4-[([1,1'-Biphenyl]-2-yl)methoxy]phenoxy}acetic acid833485-20-4C21H18O4
Frequently asked questions
What is the molar mass of C21H18O4?
The molar mass of C21H18O4 is 334.37 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms and 4 oxygen atoms. The monoisotopic mass is 334.1205 Da.
How many compounds have the formula C21H18O4?
CompoundList lists 115 compounds with the molecular formula C21H18O4, including Psora-4, Isopongaflavone, 3,5-Bis(phenylmethoxy)benzoic acid. 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 C21H18O4?
C21H18O4 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.