2-(Phenylalanylglycyl)amino-3-(4-nitrophenyl)-1,3-propanediol 93359-23-0 Glycinamide, L-phenylalanyl-N-(2-hydroxy-1-(hydroxymethyl)-2-(4-nitrophenyl)ethyl)-, (R-(R*,R*))- PG-Chloramphenicol