8-Hydroxy-13-methoxy-17,17-dimethyl-15-(3-methyl-2-butenyl)-3,16-dioxapentacyclo[11.4.1.02,11.02,15.04,9]octadeca-4,6,8,11-tetraene-10,14-dione

Abstract

The title compound, C24H26O6, is a caged-polyprenylated xanthone which has been isolated for the first time from the roots of C. cochinchinese. The cyclo­hexane ring adopts a standard boat conformation, the cyclo­hexene rings are in twisted boat and twist-boat conformations, and the tetra­hydro­furan ring has an envelope conformation. The structure is stabilized by intra­molecular C—H⋯O and O—H⋯O hydrogen bonds. C—H⋯O inter­molecular hydrogen bonds and C—H⋯π stacking inter­actions link the mol­ecules into mol­ecular sheets parallel to the bc plane.