16-O-Methylcafestol

16-O-Methylcafestol
Names
	IUPAC name 16α-Methoxy-3,18-(epoxymetheno)-19-nor-5β,8α,9β,10α,13β,16β-kaur-3-en-17-ol
	Systematic IUPAC name [(3bS,5aS,7R,8R,10aR,10bS)-7-Methoxy-10b-methyl-3b,4,5,6,7,8,9,10,10a,10b,11,12-dodecahydro-5a,8-methanocyclohepta[5,6]naphtho[2,1-b]furan-7-yl]methanol
Identifiers
CAS Number	108214-28-4 ;
3D model (JSmol)	Interactive image;
ChemSpider	22901058;
PubChem CID	68103163;
UNII	TJ95S36BVX ;
CompTox Dashboard (EPA)	DTXSID30737953 ;
	InChI InChI=1S/C21H30O3/c1-19-8-6-17-15(7-10-24-17)16(19)5-9-20-11-14(3-4-18(19)20)21(12-20,13-22)23-2/h7,10,14,16,18,22H,3-6,8-9,11-13H2,1-2H3/t14-,16-,18+,19-,20+,21+/m1/s1 Key: BDVVNPOGDNWUOI-GVOJMRIRSA-N;
	SMILES C[C@@]12CCC3=C([C@H]1CC[C@]45[C@H]2CC[C@H](C4)[C@](C5)(CO)OC)C=CO3;
Properties
Chemical formula	C21H30O3
Molar mass	330.468 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

16-O-Methylcafestol, a derivative of cafestol, is an isolate of green coffee beans.

This derivative only occurs in the robusta variant of coffee (as opposed to the more expensive arabica, where only cafestol is present). Thus 16-O-Methylcafestol is used as an analytical marker for determining the robusta content of coffee blends.