A new 4',7-epoxy-8,3'-oxyneolignan from the acetone extract of Juniperus brevifolia leaves

摘要

A new oxyneolignan (re/-(7a,8P)-3-methoxy-4',7-epoxy-8,3'-oxyneolignan-4,9,9'-triol) with a scarce C7-O-C4/ and C_8-0-C_3/ epoxy linkage, along with eight known compounds, abieta-8,ll,13-triene, sandaracopimara-8(14),15-diene, 6,7-dehydroferruginol methyl ether, 18-hydroxydehydroabietane, sandaracopimara-8(14),15-dien-18-ol, docosanol, sugiol and palmitic acid, were isolated from the chloroform-soluble fraction of the acetone extract from Juniperus brevifolia leaves. Their structures were establishedon the basis of the spectral evidences and direct comparison with values from literature data.