Bortezomib Velcade 3 for Injection is a single agent indicated for cancer treatment. This intravenous injection is available vial that contains 3.5 mg of bortezomib as a sterile lyophilized powder. Product Specification: Inactive ingredient: 35 mg MannitolChemical Name: (1R)-3--1-(2S)-1-OXO-3-Phenyl-2-(Pyrazinecarboxylic) Amino Propyl Amino butyl Boronic Acid Features: Bortezomib is a modified dipeptidyl boronic acidThe product is provided as a mannitol boronic ester which, in reconstituted form, consists of the mannitol ester in equilibrium with its hydrolysis product, the monomeric boronic acidThe drug substance exists in its cyclic anhydride form as a trimeric boroxine