|Phytochemistry, 1997 , 46 (6) :1051-1057. |
|Abietane diterpene acids and other constituents from the leaves of Larix kaempferi[Reference: WebLink]|
METHODS AND RESULTS:
The new diterpene acids were isolated from the leaves of Larix kaempferi, together with two known sesquiterpenes, (−)-α-cadinol and oplopanone, and 10 known diterpenes, larixol, dehydroabietinol, 7-oxo-dehydroabietinol, 7-oxodehydroabietic acid, 9α,13α-epidioxyabiet-8(14)-en-18-oic acid, 9β,13β-epidioxyabiet-8(14)-en-18-oic acid, dehydroabietic acid, 7α-hydroxydehydroabietic acid, 8α,9α,13α,14α-diepoxyabietan-18-oic acid and 15-hydroxydehydroabetic acid.
The new acids and their methyl esters were characterized as methyl abieta-8,11,13,15-tetraen-18-oic acid, methyl 16-Nor-15-oxodehydroabietic acid and methyl 12,15-dihydroxydehydroabietic acid, on the basis of chemical and spectroscopic evidence.