oleclumab oleclumab oleclumab (inn; development code medi9447) is a human monoclonal antibody targeting the ectonucleotidase cd73 that was designed for the treatment of pancreatic and colorectal and other cancers. oleclumabmonoclonal antibodytype?sourcehumantarget5'-nucleotidase nt5eclinical dataother namesmedi9447atc codenoneidentifierscas number1803176-05-7chemspidernoneunii5cry01uryqkeggd10963chemical and physical dataformulac6348h9826n1710o1998s40molar mass143350.81 g·mol−1 this drug was developed by medimmune/astrazeneca.