2-((p-Acetylphenyl)azo)-2-cyanoacetic acid methyl ester 3-thiosemicarbazone 4-Acetyl-phenyl-azo-cyanessigsaeure-methyl-ester-thiosemicarbazon [German] AF1685000 Acetic acid, 2-((p-acetylphenyl)azo)-2-cyano-, methyl ester, 3-thiosemicarbazone F 2327