Bortezomib (PS-341) Bortezomib (PS-341) Synonyms: [(1r)-3-methyl-1-[[(2s)-1-oxo-3-phenyl-2-[(pyrazinylcarbonyl)amino]propyl]amino]butyl]-boronic acid; dpba; VELCADE; VELCADE(BORTEZOMIB); Boronic acid, B-[(1R)-3-methyl-1-[[(2S)-1-oxo-3-phenyl-2-[(2-pyrazinylcarbonyl)amino]propyl]amino]butyl]-; Bortezomib for research CAS NO.: 179324-69-7 Formula: C19H25BN4O4 Weight: 384.237