Synonyms: 21H-Biline,1-bromo-8,12,13,18-tetraethyl-10,23-dihydro-2,3,7,17,19-pentamethyl-,dihydrobromide (9CI); Pyrrole,2-[[2-[(5-bromo-3,4-dimethylpyrrol-2-yl)methylene]-4-ethyl-3-methyl-2H-pyrrol-5-yl]methyl]-3,4-diethyl-5-[(4-ethyl-3,5-dimethyl-2H-pyrrol-2-ylidene)methyl]-,dihydrobromide (8CI)