LABDANES FROM CRYPTOMERIA JAPONICA

Article abstract of DOI:10.1016/S0031-9422(00)89538-2

Twenty-seven labdanes were isolated from the leaves of Cryptomeria japonica.The new compounds include 15-(2-oxopropylidene)labd-8(17)-en-19-oic acid, 15-oxolabda-8(17),13(E)-dien-19-oic acid, 7β-acetoxy-15-hydroxylabda-8(17),13E-dien-19-oic acid methyl ester, 14-hydroxy-15-norlabd-8(17)-en-19-oic acid methyl ester, 15-hydroxylabda-8(17),13Z-dien-19-oic acid methyl ester, 15,16-epoxylabda-13(16),14-dien-8α,19-diol, 8α-hydroxylabda-13(16),14-dien-19-yl p-methoxycinnamate, an ester formed by 15-acetylisocupressic acid and cryptomeridiol and an ether formed by isocupressic acid and cryptomeridiol. - Key words: Cryptomeria japonica; Taxodiaceae; leaves; diterpenes; labdane-type.