Pyrrole:
Pyrrole is a heterocyclic aromatic organic compound, a five-membered ring with the formula C4H4NH. It is a colourless volatile liquid that darkens readily upon exposure to air.
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吡咯:
吡咯（Pyrrole，1-氮杂-2,4-环戊二烯），杂环化合物之一。
zh.wikipedia.org
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Pyrrole吡咯