Molecular formula
C21H18O5
77 compounds have this formula on CompoundList.
- Molar mass
- 350.37g/mol
- Monoisotopic mass
- 350.1154Da
- Atoms
- 44
- Elements
- 3
- Rings plus double bonds
- 13
The formula C21H18O5 describes a molecule made of 21 carbon atoms, 18 hydrogen atoms and 5 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 × 2171.99%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 185.18%1.008 × 18 = 18.144 g/mol
- O Oxygen × 522.83%15.999 × 5 = 79.995 g/mol
Look up another formula
Compounds with the formula C21H18O5
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 77 of 77 compounds
Pap-1
CAS 870653-45-5C21H18O5
4'-O-Methylalpinumisoflavone
CAS 27762-87-4C21H18O5
Glycyrrhizol B
CAS 877373-01-8C21H18O5
![Methyl 4-{[(4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl)oxy]methyl}benzoate chemical structure, C21H18O5, CAS 302549-10-6](/s/DJNFTCQTTKQPPR-UHFFFAOYSA-N.svg)
Methyl 4-{[(4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl)oxy]methyl}benzoate
CAS 302549-10-6C21H18O5
Leiocarpin
CAS 34198-69-1C21H18O5
![1-Methyl-1-(7-oxo-2,3-dihydro-7H-furo[3,2-g]chromen-2-yl)ethyl benzoate chemical structure, C21H18O5, CAS 17559-85-2](/s/VIPXLQMQEIDXMH-UHFFFAOYSA-N.svg)
1-Methyl-1-(7-oxo-2,3-dihydro-7H-furo[3,2-g]chromen-2-yl)ethyl benzoate
CAS 17559-85-2C21H18O5
![[(6-Methyl-4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl)oxy](phenyl)acetic acid chemical structure, C21H18O5, CAS 405917-18-2](/s/KLLZOKTVXPUFSZ-UHFFFAOYSA-N.svg)
[(6-Methyl-4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl)oxy](phenyl)acetic acid
CAS 405917-18-2C21H18O5
![4-{[(6-Methyl-4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl)oxy]methyl}benzoic acid chemical structure, C21H18O5, CAS 307549-10-6](/s/ZBJPWHWAPHBXPX-UHFFFAOYSA-N.svg)
4-{[(6-Methyl-4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl)oxy]methyl}benzoic acid
CAS 307549-10-6C21H18O5
Lespeflorin H2
CAS 1108717-80-1C21H18O5
Maximaisoflavone B
CAS 4737-28-4C21H18O5
![6-Oxo-7,8,9,10-tetrahydro-6H-benzo[c]chromen-3-yl 3-methoxybenzoate chemical structure, C21H18O5, CAS 328022-55-5](/s/VDWWNGUUZKCGOZ-UHFFFAOYSA-N.svg)
6-Oxo-7,8,9,10-tetrahydro-6H-benzo[c]chromen-3-yl 3-methoxybenzoate
CAS 328022-55-5C21H18O5
Emoroidocarpan
CAS 169397-86-8C21H18O5
![6-Oxo-7,8,9,10-tetrahydro-6H-benzo[c]chromen-3-yl 4-methoxybenzoate chemical structure, C21H18O5, CAS 328022-54-4](/s/MYZWVASCCDEVDV-UHFFFAOYSA-N.svg)
6-Oxo-7,8,9,10-tetrahydro-6H-benzo[c]chromen-3-yl 4-methoxybenzoate
CAS 328022-54-4C21H18O5
Glabrachromene ii
CAS 51848-09-0C21H18O5
Prop-2-enyl 2-(2-methyl-4-oxo-3-phenylchromen-7-yl)oxyacetate
CAS 100170-83-0C21H18O5
Prop-2-enyl 2-(4-methyl-2-oxo-3-phenylchromen-7-yl)oxyacetate
CAS 896036-63-8C21H18O5
Indicanine C
CAS 141737-82-8C21H18O5
6-Ethoxy-4-(7-methoxy-1-benzofuran-2-yl)-7-methyl-2H-chromen-2-one
CAS 898430-17-6C21H18O5
3-(4-Methoxyphenyl)-4-methyl-2-oxo-2H-chromen-7-yl cyclopropanecarboxylate
CAS 869080-69-3C21H18O5
4'-O-Methylderrone
CAS 34086-52-7C21H18O5
6H-Naphtho(2',1':4,5)furo(3,2-c)(1)benzopyran-8-ol, 6a,13a-dihydro-3,9-dimethoxy-, cis-
CAS 184900-60-5C21H18O5
4-(4'-Acetyl-biphenyl-4-yloxymethyl)-5-methyl-furan-2-carboxylic acid
CAS 736182-14-2C21H18O5
Nrf2/HO-1 activator 1
CAS 2883506-60-1C21H18O5
Semiglabrinol
CAS 51787-33-8C21H18O5
- 4'-O-Methylatalantoflavone1205687-49-5C21H18O5
- Warfarin acetate5979-00-0C21H18O5
- (3aR,4R,5R,6aS)-4-Formyl-2-oxohexahydro-2H-cyclopenta[b]furan-5-yl [1,1'-biphenyl]-4-carboxylate38754-71-1C21H18O5
- Benzyl [(4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl)oxy]acetate307548-72-7C21H18O5
- 2-Methoxy-4-{(E)-[5-(4-methylphenyl)-2-oxofuran-3(2H)-ylidene]methyl}phenyl acetate6014-58-0C21H18O5
- 2-Ethoxy-benzoic acid 4-oxo-1,2,3,4-tetrahydro-cyclopenta[c]chromen-7-yl ester302573-14-4C21H18O5
- Methyl 2-(((Z)-3-oxo-2-((E)-3-phenylallylidene)-2,3-dihydrobenzofuran-6-yl)oxy)propanoate620546-46-5C21H18O5
- (Z)-2-((E)-3-(2-Methoxyphenyl)allylidene)-6-(2-oxopropoxy)benzofuran-3(2H)-one859132-69-7C21H18O5
- 7-[2-(4-Methoxyphenyl)-2-oxoethoxy]-2,3-dihydrocyclopenta[c]chromen-4(1H)-one374762-16-0C21H18O5
- 4-Oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl (3-methylphenoxy)acetate302573-17-7C21H18O5
- Ethyl 2-(((Z)-3-oxo-2-((E)-3-phenylallylidene)-2,3-dihydrobenzofuran-6-yl)oxy)acetate620547-87-7C21H18O5
- (Z)-Methyl 4-((6-((2-methylallyl)oxy)-3-oxobenzofuran-2(3H)-ylidene)methyl)benzoate858768-04-4C21H18O5
- Benzoic acid, 4-(6-oxo-7,8,9,10-tetrahydro-6H-benzo[c]chromen-3-yloxymethyl)-302549-13-9C21H18O5
- 4-[2-(4-Phenoxyphenoxy)ethoxy]benzoic acid929975-44-0C21H18O5
- (Z)-2-(Benzo[d][1,3]dioxol-5-ylmethylene)-6-((3-methylbut-2-en-1-yl)oxy)benzofuran-3(2H)-one929413-78-5C21H18O5
- (Z)-2-(2-Ethoxybenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl cyclopropanecarboxylate623116-57-4C21H18O5
- Ethyl 2-methyl-5-{[(2E)-3-phenylprop-2-enoyl]oxy}-1-benzofuran-3-carboxylate304643-47-8C21H18O5
- 7-[2-(3-Methoxyphenyl)-2-oxoethoxy]-2,3-dihydrocyclopenta[c]chromen-4(1H)-one500203-98-5C21H18O5
- [4-[3-(1-Hydroxy-3,4-dioxonaphthalen-2-yl)propyl]phenyl] acetate18093-50-0C21H18O5
- (l)-Neorautenane65418-33-9C21H18O5
- [(7-Methyl-4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-9-yl)oxy](phenyl)acetic acid500204-21-7C21H18O5
- 3-[(2E)-3-(4-Ethoxy-3-methoxyphenyl)prop-2-enoyl]-2H-chromen-2-one690214-64-3C21H18O5
- Dimethyl 4,4'-(3-oxopenta-1,4-diene-1,5-diyl)dibenzoate129009-94-5C21H18O5
- 4-(((7-Methyl-4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-9-yl)oxy)methyl)benzoic acid314744-39-3C21H18O5
- (4-Methyl-2-oxo-7-{[(2E)-3-phenylprop-2-en-1-yl]oxy}-2H-chromen-3-yl)acetic acid701946-74-9C21H18O5
- 2-(2-Methoxyphenyl)-5,10-dimethyl-2,3-dihydro-4H,8H-pyrano[2,3-f]chromene-4,8-dione1007656-19-0C21H18O5
- 2-(4-Methoxyphenyl)-5,10-dimethyl-2,3-dihydro-4H,8H-pyrano[2,3-f]chromene-4,8-dione1010928-41-2C21H18O5
- 4-Benzyl-gallic Acid Benzyl Ester1159977-07-7C21H18O5
- 6-Methyl-4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl 3-methoxybenzoate670244-98-1C21H18O5
- Methyl [(4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl)oxy](phenyl)acetate670243-18-2C21H18O5
- 4-(Ethoxycarbonyl)benzyl 3-hydroxy-2-naphthoate516469-54-8C21H18O5
- 4-(Ethoxycarbonyl)benzyl 1-hydroxy-2-naphthoate672342-31-3C21H18O5
- 6-Methyl-4-oxo-1,2,3,4-tetrahydrocyclopenta[c]chromen-7-yl 4-methoxybenzoate670242-40-7C21H18O5
- 6-(3,4-Dimethoxyphenyl)-2,3-dimethyl-7H-furo[3,2-g]chromen-7-one853892-74-7C21H18O5
- 4-(4-(2-Butenoyloxy)benzoyl)phenyl 2-butenoate624726-51-8C21H18O5
- 2-Naphthalenecarboxylic acid, 4-(acetyloxy)-8-(phenylmethoxy)-, methyl ester144003-45-2C21H18O5
- Dimethyl 4,4'-((1E,4E)-3-oxopenta-1,4-diene-1,5-diyl)dibenzoate881916-00-3C21H18O5
- Benzeneacetic acid, alpha-(3-hydroxy-4-(2-methylphenyl)-5-oxo-2(5H)-furanylidene)-2-methyl-, methyl ester54805-67-3C21H18O5
- Benzeneacetic acid, alpha-(3-hydroxy-4-(3-methylphenyl)-5-oxo-2(5H)-furanylidene)-3-methyl-, methyl ester54805-66-2C21H18O5
- Benzeneacetic acid, alpha-(3-hydroxy-4-(4-methylphenyl)-5-oxo-2(5H)-furanylidene)-4-methyl-, methyl ester, (E)-37542-24-8C21H18O5
- 2-Naphthalenol, carbonate (2:1)89784-86-1C21H18O5
- 3',4'-Methylenedioxy-7-hydroxy-6-isopentenyl flavone126622-44-4C21H18O5
- (R)-2-(7-Oxo-2,3-dihydro-7H-furo[3,2-g]chromen-2-yl)propan-2-yl benzoate1212180-26-1C21H18O5
- Prop-2-enyl 2-[[2-[(4-methylphenyl)methylidene]-3-oxo-1-benzofuran-6-yl]oxy]acetate7048-64-8C21H18O5
- Diethyl (10-oxoanthracen-9(10H)-ylidene)propanedioate105488-34-4C21H18O5
- 2-(6-Ethyl-1-hydroxynaphthalene-2-carbonyl)-3-methoxybenzoic acid39546-36-6C21H18O5
- 4-Ethoxy-6,7-dimethyl-5,8-dioxo-5,8-dihydronaphthalen-2-yl benzoate61735-63-5C21H18O5
- 4,6,11-Trimethoxy-7,8-dihydrotetracene-5,12-dione77199-86-1C21H18O5
- 2,4-Dihydroxybenzaldehyde, methyl 4-phenylbenzoate1051364-47-6C21H18O5
- Benzoic acid--3-(hydroxymethyl)phenyl benzoate (1/1)106262-10-6C21H18O5
- 6,7-Dimethoxy-9-(4-methoxyphenyl)naphtho[2,3-c]furan-1(3H)-one145726-16-5C21H18O5
- Benzoic acid,2-[(4-hydroxy-3-methoxyphenyl)(4-hydroxyphenyl)methyl]-3624-88-2C21H18O5
- Orb32366363107904-59-3C21H18O5
Frequently asked questions
What is the molar mass of C21H18O5?
The molar mass of C21H18O5 is 350.37 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms and 5 oxygen atoms. The monoisotopic mass is 350.1154 Da.
How many compounds have the formula C21H18O5?
CompoundList lists 77 compounds with the molecular formula C21H18O5, including Pap-1, 4'-O-Methylalpinumisoflavone, Glycyrrhizol B. 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 C21H18O5?
C21H18O5 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.