Diindolo(3,2-b:3',2'-m)triphenodioxazinetrisulfonic acid, 8,18-dichloro-5,15-diethyl-5,15-dihydro-;8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo(3,2-b:3',2'-m)triphenodioxazinetrisulphonic acid
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