Chemical Structures of Excoecarins A, B and C: Three New Labdane-Type Diterpenes from Wood, Excoecaria agallocha.
作者:Tenji KONISHI、Shiu KIYOSAWA、Takao KONOSHIMA、Yasuhiro FUJIWARA
DOI:10.1248/cpb.44.2100
日期:——
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.
从 Agallocha LINN Excoecaria 的木材中分离出了三种新的二萜类化合物,即十八萜 A (2)、B (3) 和 C (4)。经确定,十八烷烃 A、B 和 C 的结构分别为 (13R,14R)-ent-8α,13; 14,15-diepoxy-13-epi-labda-3-one (2)、(13R,14S)-ent-8α,13;在光谱数据和化学证据的基础上,分别得出了(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-3β-ol(4)。