116989-63-0 6H-Indolo(2,3-b)quinoxaline-6-acetic acid, 2-(((4-bromophenyl)amino)thiocarbonyl)hydrazide N(sup 1)-(Indophenazine-N(sup 6)-methylenecarbonyl)-N(sup 4)-(p-bromophenyl)thiosemicarbazide