1 R32 (2s,4s,5s)-5-amino-N-(3-amino-2,2-dimethyl-3-oxopropyl)-6-[4-(2-chlorophenyl)-2,2-dimethyl-5-oxopiperazin-1-yl]-4-hydroxy-2-(propan-2-yl)hexanamide 1.000 2 R31 (2s,4s,5s)-5-amino-N-(3-amino-2,2-dimethyl-3-oxopropyl)-4-hydroxy-6-{4-[2-(3-methoxypropoxy)phenyl]-3-oxopiperazin-1-yl}-2-(propan-2-yl)hexanamide 0.786