19471-28-4 3-Picoline, 4-((4-(dimethylamino)-o-tolyl)azo)-, 1-oxide 4-((4-(Dimethylamino)-o-tolyl)azo)-3-picoline 1-oxide N,N,3-Trimethyl-4-(4'-(3'-methylpyridyl-1'-oxide)azo)aniline