太白木忽木根皮中三萜皂甙成分研究

STUDIES ON THE TRITERPENOID SAPONINS OF THE ROOT BARK OF ARALIA TAIBAIENSIS

从太白木忽木（ＡｒａｌｉａｔａｉｂａｉｅｎｓｉｓＺ．Ｚ．ＷａｎｇｅｔＨ．Ｃ．Ｚｈｅｎｇ）根皮中首次分离到四个三萜皂甙，根据理化性质和光谱数据，分别鉴定为齐墩果酸３Ｏ［βＤ吡喃木糖（１→２）］［βＤ吡喃葡萄糖（１→３）］βＤ吡喃葡萄糖醛酸甙（１），ｔａｒａｓａｐｏｎｉｎＶ（２），３Ｏ｛βＤ吡喃木糖（１→２）［βＤ吡喃葡萄糖（１→３）］βＤ吡喃葡萄糖醛酸乙酯｝齐墩果酸２８ＯβＤ吡喃葡萄糖甙（３）和３Ｏ｛βＤ吡喃木糖（１→２）［βＤ吡喃葡萄糖（１→３）］βＤ吡喃葡萄糖醛酸丁酯｝齐墩果酸２８ＯβＤ吡喃葡萄糖甙（４）。１为新天然产物，３和４为新化合物，分别命名为太白木忽木皂甙ＶＩ（ｔａｉｂａｉｅｎｏｓｉｄｅＶＩ）、太白木忽木皂甙ＶＩＩ（ｔａｉｂａｉｅｎｏｓｉｄｅＶＩＩ）和太白木忽木皂甙ＶＩＩ（ｔａｉｂａｉｅｎｏｓｉｄｅＶＩＩ）。

Four triterpenoid saponins were isolated from the root bark of Aralia taibaiensis Z.Z.Wang et H.C.Zheng. On the basis of their chemical properties and spectral data, they were identified as oleanolic acid 3 O [β D xylopyranosyl(1→2)][β D glucopyranosyl(1→3)] β D glucuronopyranoside (1), tarasaponin V (2), 3 O {β D xylopyranosyl(1→2)[β D glucopyranosyl(1→3)] 6′ O ethyl β D glucuronopyranosyl} oleanolic acid 28 O β D glucopyranoside (3) and 3 O {β D xylopyranosyl(1→2)[β D glucopyranosyl(1→3)] 6′ O butyl β D glucuronopyranosyl} oleanolic acid 28 O β D glucopyranoside (4). Compound 1 is a new natural product named taibaienoside VI. 2 was isolated from the title plant for the first time. 3 and 4 are new compounds and named taibaienoside VII and taibaienoside VIII, respectively.