Ahmed W, Usmanghani K, Ahmad I, Ahmad V U, Miyase T
Department of Pharmacognosy, University of Karachi, Pakistan.
Chem Pharm Bull (Tokyo). 1994 Feb;42(2):314-7. doi: 10.1248/cpb.42.314.
Three new triterpenoid saponins, their methyl esters designated as castaralesides F (1), G (2) and H (3), were isolated from the fresh leaves of Castanospermum australe. The structures of these three saponins were elucidated on the basis of chemical and spectral data as 3 beta-O-[beta-galactopyranosyl-(1-->4)-beta-glucuronopyranosyl]-2 beta,23-dihydroxyolean-12-en-28-oic acid; 3 beta-O-[alpha-rhamnopyranosyl-(1-->4)-beta-galactopyranosyl-(1-->2)-beta - glucurono-pyranosyl]-2 beta,28-dihydroxyolean-12-ene; and 3 beta-O-[alpha-rhamnopyranosyl-(1-->4)-beta-xylopyranosyl-(1-->2)-beta- glucuronopyranosyl]-2 beta,28-dihydroxyolean-12-ene.
从澳大利亚栗豆树的新鲜叶子中分离出三种新的三萜皂苷，它们的甲酯分别命名为栗豆皂苷F（1）、G（2）和H（3）。基于化学和光谱数据阐明了这三种皂苷的结构，分别为3β - O - [β - 吡喃半乳糖基 - （1→4） - β - 吡喃葡萄糖醛酸基] - 2β，23 - 二羟基齐墩果 - 12 - 烯 - 28 - 酸；3β - O - [α - 吡喃鼠李糖基 - （1→4） - β - 吡喃半乳糖基 - （1→2） - β - 葡萄糖醛酸吡喃糖基] - 2β，28 - 二羟基齐墩果 - 12 - 烯；以及3β - O - [α - 吡喃鼠李糖基 - （1→4） - β - 吡喃木糖基 - （1→2） - β - 葡萄糖醛酸吡喃糖基] - 2β，28 - 二羟基齐墩果 - 12 - 烯。
