116990-03-5 6H-Indolo(2,3-b)quinoxaline-6-acetic acid, 9-chloro-, (1-(4-methoxyphenyl)ethylidene)hydrazide 9-Chloro-6H-indolo(2,3-b)quinoxaline-6-acetic acid (1-(4-methoxyphenyl)ethylidene)hydrazide