76508-93-5 Benzoic acid, 2-hydroxy-4-((((2-hydroxy-1-(hydroxymethyl)-2-(4-nitrophenyl)ethyl)amino)oxoacetyl)amino)-, (S-(R*,R*))- Salicylic acid, 4-(N(sup 2)-(1,3-dihydroxy-2-(p-nitrophenyl)-2-propyl)oxamido)-, L-threo-, (+)-