叶绿素的分子结构已经搞清，它是由卟啉组成的。
The structure of the chlorophyll molecule is known. It consists of porphyrin.
卟啉结构中具有铁，是组成叶绿素的必要物质。
It is found in porphyrins, and is essential for chlorophyll synthesis.
例如吡咯希夫碱、卟啉光敏剂、叶绿素铜钠盐等都是吡咯的衍生物。
Other compounds, for example, pyrrole Schiff base, porphyrin photosensitizers and sodium copper chlorophyll in, are also pyrrole derivatives.
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