Heme, a complex heterocyclic compound, is an organic molecule derived from porphyrin with an iron atom at the centre.
血红素(一种复杂的杂环化合物)是来自中心含铁原子的的一种有机分子。
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The essence of polar conversion is that organic compound reflects the carbon atom electricity in the centre and changes, kiss the electricity or kiss the core course changing.