1H-1,2,4-Triazolium, 5-((4-(diethylamino)phenyl)azo)-1,4-dimethyl-,ethanedioate (1:1) 1H-1,2,4-Triazolium, 5-((4-(diethylamino)phenyl)azo)-1,4-dimethyl-,oxalate monohydrogen 73398-74-0