(R-(R*,R*))-N-(2-Hydroxy-1-(hydroxymethyl)-2-(4-nitrophenyl)ethyl)-2-oxoacetamide 73981-53-0 Acetamide, N-(2-hydroxy-1-(hydroxymethyl)-2-(4-nitrophenyl)ethyl)-2-oxo-, (R-(R*,R*))- Chloramphenicol aldehyde