2-[(2-cyanoethyl)[4-[[2-(methylsulphonyl)-4-nitrophenyl]azo]phenyl]amino]ethyl acetate

3-[[2-(acetyloxy)ethyl][4-[[2-(methylsulfonyl)-4-nitrophenyl]azo]phenyl]amino]-Propanenitrile

Acetic acid 2-[(2-cyanoethyl)[4-[[4-nitro-2-(methylsulfonyl)phenyl]azo]phenyl]amino]ethyl ester