Chemical and Pharmaceutical Bulletin p. 2100 - 2102 (1996)
Update date:2022-08-03
Topics:
Konishi, Tenji
Kiyosawa, Shiu
Konoshima, Takao
Fujiwara, Yasuhiro
Three new diterpenes, excoecarins A (2), B (3) and C (4) have been isolated from the wood of Excoecaria agallocha LINN. The structures of excoecarins A, B and C were established as (13R,14R)-ent-8α, 13;14,15- diepoxy-13-epi-labda-3-one (2), (13R,14S)-ent-8α, 13;14, 15-diepoxy-13-epi- labda-3-one (3), (13R,14R)-ent-8α, 13;14,15-diepoxy- 13-epi-labda-3β-ol (4), respectively, on the basis of spectroscopic data and chemical evidence.
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