1 SBL L-naphthyl-1-acetamido boronic acid alanine 1.000 2 SBD D-naphthyl-1-acetamido boronic acid alanine 1.000 3 CLB D-para-chlorophenyl-1-acetamidoboronic acid alanine 0.815 4 CLD D-para-chlorophenyl-1-acteamidoboronic acid alanine 0.815 5 SRB L-1-naphthyl-2-acetamido-ethane boronic acid 0.704 6 SRD D-1-naphthyl-2-acetamido-ethane boronic acid 0.704