C21H20O8
46 compounds have this formula on CompoundList.
- Molar mass
- 400.38g/mol
- Monoisotopic mass
- 406.1535Da
- Atoms
- 49
- Elements
- 3
- Rings plus double bonds
- 12
The formula C21H20O8 describes a molecule made of 21 carbon atoms, 20 hydrogen atoms and 8 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 × 2163.00%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 205.04%1.008 × 20 = 20.160 g/mol
- O Oxygen × 831.97%15.999 × 8 = 127.992 g/mol
Compounds with the formula C21H20O8
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 46 of 46 compounds
![3,9-Bis(1,3-benzodioxol-5-yl)-2,4,8,10-tetraoxaspiro[5.5]undecane chemical structure, C21H20O8, CAS 218598-83-5](/s/LOGORLJVFDSHIE-UHFFFAOYSA-N.svg)
![2-[(E)-2-(3,5-Dihydroxyphenyl)ethenyl]-5-hydroxy-6,7,8-trimethoxy-3-methylchromen-4-one chemical structure, C21H20O8, CAS 103654-49-5](/s/OUTWDDOLLXVXMF-AATRIKPKSA-N.svg)
![(5R,5aS,8aR)-5,8,8a,9-Tetrahydro-10-hydroxy-5-(4-hydroxy-3,5-dimethoxyphenyl)furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxol-6(5aH)-one chemical structure, C21H20O8, CAS 477-46-3](/s/JGGWNGRBXJWAOC-LZVXQISVSA-N.svg)
- Methyl 2-{3-oxo-2-[(2,4,5-trimethoxyphenyl)methylene]benzo[3,4-b]furan-6-yloxy}acetate620547-46-8C21H20O8
- 7-Deoxysteffimycinol63493-74-3C21H20O8
- 7-Hydroxyflavone-beta-D-glucoside71802-05-6C21H20O8
- Stemonacetal54357-81-2C21H20O8
- (9R)-9-(1,2-Dihydroxyethyl)-6,9,11-trihydroxy-4-methoxy-8,10-dihydro-7H-tetracene-5,12-dione187105-52-8C21H20O8
- Methyl {[(2E)-3-oxo-2-(2,3,5-trimethoxybenzylidene)-2,3-dihydro-1-benzofuran-6-yl]oxy}acetate1676104-69-0C21H20O8
- 5-AcTMF1620970-95-7C21H20O8
- Podophyllotoxin, 3'-demethyl54747-66-9C21H20O8
- Methyl 5-({[3-(2-methoxy-2-oxoethyl)-4,8-dimethyl-2-oxo-2H-chromen-7-yl]oxy}methyl)furan-2-carboxylate1190294-55-3C21H20O8
- Thymusin 6-isobutyrate264608-83-5C21H20O8
- 2-Phenyl-6-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxychromen-4-one20594-05-2C21H20O8
- 4-Oxo-2-phenyl-4H-1-benzopyran-5-yl beta-D-glucopyranoside71802-04-5C21H20O8
- (2R,3R,4S,5S)-2-Methoxy-5-(methoxycarbonyl)tetrahydrofuran-3,4-diyl Dibenzoate163152-38-3C21H20O8
- 3-[3-(beta-d-Glucopyranosyloxy)phenyl]-1H-2-benzopyran-1-one56383-84-7C21H20O8
- 2H-1-Benzopyran-3,5,7-triol, 2-[4-(acetyloxy)phenyl]-3,4-dihydro-, 3,7-diacetate, (2R,3S)-rel-132400-74-9C21H20O8
- (8S,10S)-6,8,10,11-Tetrahydroxy-8-((R)-1-hydroxyethyl)-1-methoxy-7,8,9,10-tetrahydrotetracene-5,12-dione125515-17-5C21H20O8
- (8S)-8-(1,2-Dihydroxyethyl)-6,8,11-trihydroxy-1-methoxy-7,8,9,10-tetrahydrotetracene-5,12-dione1219117-30-2C21H20O8
- Terephthalic acid, bis(2-hydroxyethyl) ester, p-acetylbenzoate100197-62-4C21H20O8
- Curcumin bicyclopentadione1671097-06-5C21H20O8
- (6aR-cis)-7,10-Dimethoxy-6a,11a-dihydro-6H-benzofuro[3,2-c]chromene-3,9-diyl diacetate22356-02-1C21H20O8
- (6aS-cis)-2,9-Dimethoxy-6a,11a-dihydro-6H-benzofuro[3,2-c]chromene-3,7-diyl diacetate89647-65-4C21H20O8
- 4-Hydroxy-3-[4-hydroxy-3-(trideuteriomethoxy)phenoxy]-1-[4-hydroxy-3-(trideuteriomethoxy)phenyl]-1,3,3a,6a-tetrahydrocyclopenta[c]furan-6-one1534367-30-0C21H20O8
Frequently asked questions
What is the molar mass of C21H20O8?
The molar mass of C21H20O8 is 400.38 g/mol, calculated from standard atomic weights for 21 carbon atoms, 20 hydrogen atoms and 8 oxygen atoms. The monoisotopic mass is 406.1535 Da.
How many compounds have the formula C21H20O8?
CompoundList lists 46 compounds with the molecular formula C21H20O8, including (-)-4'-Demethylepipodophyllotoxin, alpha-Peltatin, 4'-Demethylpodophyllotoxin. 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 C21H20O8?
C21H20O8 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.