1 PBA Phenylethane boronic acid 1.000 2 A1IKR Tris(oxidanyl)-[(~{E})-2-phenylethenyl]boron 0.917 3 B2F Phenylalanine boronic acid 0.917 4 PYJ Phenylethane 0.727 5 SYN Ethenylbenzene 0.727