| 释义 |
py·ran AHD[pīʹrăn'] D.J.[ˈpaɪˌræn]K.K.[ˈpaɪˌræn]n.（名词）- Either of two isomeric compounds with the formula C5H 6O, having a ring of five carbon atoms and one oxygen atom. 吡喃：化学分子式是C5H 6O的两种同分异构化合物中的任一种，且有五个碳原子和一个氧原子构成的环状物
- pyrone [heterocyclic compound] pyr(o)- -one pyrone [杂环化合物] pyr(o)- -one
- -an 2-an2
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