= pyrrole ring n.
| 单词 | θ69999 |
| 释义 | the world > matter > chemistry > organic chemistry > organic compounds > [noun] > heterocyclic compounds > containing nitrogen > pyrrole > pyrrole ring (2) pyrrole nucleus1889 = pyrrole ring n. pyrrole ring1903 an aromatic ring of four carbon atoms and one nitrogen atom. |
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