CAS 127749-96-6 L-Proline, 1-(3-((4-amino-2-((2-naphthalenylcarbonyl)amino)-1,4-dioxobutyl)amino)-2-hydroxy-4-phenylbutyl)-, 1,1-dimethylethyl ester, (2R-(2R*,3S*(S*)))- (HCID 451725)|Huagongshe