下列除哪项化合物外,均可用Borntrag-er反应鉴别A.大黄素B.大黄酸C.大黄酚D.羟基茜草素E.番泻苷A

作者: rantiku 人气: - 评论: 0
问题 下列除哪项化合物外,均可用Borntrag-er反应鉴别
选项 A.大黄素 B.大黄酸 C.大黄酚 D.羟基茜草素 E.番泻苷A
答案 E
解析 :Borntrager反应是羟基醌类在碱性溶液中发生颜色改变,会使颜色加深。番泻苷A为二蒽酮衍生物。
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