2-Heptanone, 7-amino-1-chloro-3-((2,4-dinitrophenyl)amino)-, (S)- 50686-84-5 L-1-Chloro-3-(2,4-dinitroanilino)-7-aminoheptan-2-one N(alpha)-2,4-Dinitrophenyllysine chloromethyl ketone Nalpha-2,4-Dinitrophenyllysine chloromethyl ketone