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从宁夏产植物牛心朴子(Cymmehumkomarovii Al.IIjinski)须根的乙醇提取物中分离并鉴定了4个C21甾体配糖体:白前苷元C 3-O-β—D-吡喃葡萄糖基-(1→4)-β-D-吡喃葡萄糖基-(1→4)-α-L-吡喃磁麻糖基-(1→4)-β-D-吡喃毛地黄毒糖基-(1→4)-β—D-吡喃夹竹桃糖苷(1),白前苷元A 3-O-β-D-吡喃葡萄糖基-(1→4)-β-D-吡喃葡萄糖基-(1→4)-α-D-吡喃夹竹桃糖基-(1→4)-β-D-吡喃毛地黄毒糖基-(1→4)-β-D-吡喃夹竹桃糖苷(