黄酮类化合物大都显黄色，广泛存在于自然界，是一类重要的天然有机化合物。这类化合物多存

发布时间：2017-06-05 09:34 │ 来源：www.tikuol.com

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问题：

黄酮类化合物大都显黄色，广泛存在于自然界，是一类重要的天然有机化合物。这类化合物多存在于双子叶植物及裸子植物中。苔类中很少含有黄酮，而藻类.微生物.细菌中没有发现黄酮类化合物存在。

游离的各种黄酮苷元母核中有旋光性的是（）

A.黄酮醇

B.黄烷醇

C.二氢黄酮醇

D.二氢黄酮

E.黄烷

F.查耳酮

考点：中医内科(医学高级)中药学中药学题库

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