19456-74-7 3-Picoline, 4-((4-(dimethylamino)-m-tolyl)azo)-, 1-oxide 4-((4-(Dimethylamino)-m-tolyl)azo)-3-picoline 1-oxide N,N,2-Trimethyl-4-(4'-(3'-methylpyridyl-1'-oxide)azo)aniline