(22R)-22-hydroxycholesteryl esters from Narthecium ossifragum

Abstract The esters of (22 R )-22-hydroxycholesterol from the flowers of N. ossifragum are monoesters, esterified in the 3β-position only. The main components are cholest-5-en-3β,22 R -diol 3-caprate (47 %) and cholest-5-en-3β,22 R diol 3-laurate (44 %). The sterol has not been found in the free state in the plant.