细茎石斛的化学成分

从兰科植物细茎石斛(Dendrobium moniliforme(L.)Sw.)中分得一个新的联苄类化合物(moniliformine),以及6个已知化合物(α-dihydropicrotoxinin、对羟基顺式肉桂酸三十烷基酯、反式阿魏酸二十八烷基酯、β-谷甾醇、胡萝卜苷和二十九烷烃),经光谱解析(UV、IR、MS、1H-NMR、13C-NMR、DEPT、HMQC和COLOC),新化合物的结构被确定为3,4-二羟基-5,4'-二甲氧基联苄(3,4-dihydroxy-5,4'-dimemoxy bibenzyl).α-dihydropicrotoxinin为首次从自然界分离得到.

Chemical Constituents of Dendrobium moniliforme

A new bibenzyl derivative, moniliformine, along with six known compounds, was isolated from a orchid Dendrobium moniliforme (L.) Sw. The new compound was identified as 3,4-dihydroxy-5,4'-dimethoxy bibenzyl on the basis of 1D and 2D NMR experiments. The six known compounds were determined to be a-dihydropicrotoxinin, n-triacontyl p-hydroxy-cis-cinnamate, n-octacostyl ferulate, b-sitosterol, daucosterol and n-nonacosane, respectively. Among them, a-dihydropicrotoxinin was isolated for the first time from the plant kingdom.