Structures of rengyol, rengyoxide, and rengyolone, new cyclohexylethane derivatives from Forsythiasuspensa fruits

Abstract

Three new C6-C2 natural alcohols, (rengyol, rengyoxide and rengyolone) were isolated from F. suspensa fruits, along with a novel glycoside, forsythoside E, a new sugar ester, 4-caffeoylrutinose, and a known quinol glucoside, cornoside. Chemical and spectroscopic studies have established the structures of these new constituents.