摘要
从诃子(Terminalia chebula ReTz.)乙醇提取物中分得4个三萜化合物,经光谱分析和化学方法确定了它们的化学结构。其中T_1,T_2和T_3分别鉴定为 terminoic acid,arjugenin和 ariunolic acid,T_4为新化合物,命名为诃五醇,其结构确定为齐墩果-12-烯-2α,3β,19α,23,28-五醇。
Four triterpenes have been isolated from the alcoholic extract of Terminalia chebula Retz.. Three of them have been identified as terminoic acid (T_1), arjugenin (T_2) and arjunolic acid(T_3). T_4 is a new compound, named chebupentol. Its stru- cture was established to be olean-12--ene--2,3, 19,23,28--pentol on the basis of its IR, MS, ~1HNMR, ^(13)CNMR, ~1H--^(13)C 2D NMR, ~1H--~1H 2D NMR and NOESY 2D NMR. The structure of compound T_4 was confirmed by the chemical transformation of T_4 from arjugenin (T_2) with LiAlH_4
关键词
诃子
三萜
Terminalia chebula
Terminoic acid
Arjugenin
Arjunolic acid
Chebupentol
