132259-06-4 Butanediamide, N4-hydroxy-N1-(2-methyl-1-(((phenylmethyl)amino)carbonyl)propyl)-2-(2-methylpropyl)-, (R-(R*,S*))- N-(3-(Hydroxyamino)carbonyl-2-isobutyl-1-oxopropyl)valinebenzylamide RP 59794 RP-59794