Pyrrole-3-carboxylicacid, 5-[[5-[[5-[(4-carboxy-3,5-dimethyl-2H-pyrrol-2-ylidene)methyl]-3-ethyl-4-methylpyrrol-2-yl]methyl]-4-ethyl-3-methyl-2H-pyrrol-2-ylidene]methyl]-2,4-dimethyl-,diethyl ester, dihydrobromide (7CI)
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