1 CLB D-para-chlorophenyl-1-acetamidoboronic acid alanine 1.000 2 CLD D-para-chlorophenyl-1-acteamidoboronic acid alanine 1.000 3 SBD D-naphthyl-1-acetamido boronic acid alanine 0.815 4 SBL L-naphthyl-1-acetamido boronic acid alanine 0.815