116989-62-9 6H-Indolo(2,3-b)quinoxaline-6-acetic acid, 2-(((4-chlorophenyl)amino)thiocarbonyl)hydrazide N(sup 1)-(Indophenazine-N(sup 6)-methylenecarbonyl)-N(sup 4)-(p-chlorophenyl)thiosemicarbazide