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单词 etioporphyrin
释义 etio·porphyrin
noun
or ae·tio·porphyrin \|ē]d.ē(ˌ)ō also |e]+\
Etymology: etio-, aetio- + porphyrin
: any of four isomeric porphyrins C20H6N4(CH3)4(C2H5)4; especially : a violet crystalline pigment occurring in nature (as in petroleum and coal) and formed by degradation of chlorophyll and of heme
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