ascrinvacumab ascrinvacumab ascrinvacumab (pf-03446962) is a monoclonal antibody designed for the treatment of cancer. ascrinvacumabmonoclonal antibodytype?sourcehumantargetactivin receptor-like kinase 1clinical dataother namespf-03446962atc codenoneidentifierscas number1463459-96-2chemspidernoneunii716fq5revokeggd11709chemical and physical dataformulac6396h9850n1694o2012s44molar mass144079.64 g·mol−1 this drug was developed by pfizer inc.