<unk>  is a boronic acid and peptide analogue like the older bortezomib. It contains a derivative of the amino acid leucine with the carboxylic acid group being replaced by a boronic acid; and the remainder of the molecule has been likened to phenylalanine. The structure has been found through a large-scale screening of boron-containing molecules.
Ixazomib
Carfilzomib
Bortezomib
Vincristine
Carmustine
Ifosfamide
Busulfan
Lenalidomide