| 单词 | γ-pyran |
| 释义 | > as lemmasγ-pyran There are two possible isomeric forms of pyran, differing in the positions of the double bonds. Of these isomers, only one (more fully γ-pyran), CH2CHCHCHCHO, has been prepared; it is a colourless, unstable oil.extracted from pyrann.< as lemmas |
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