diridavumab diridavumab diridavumab (cr6261) (inn) is a monoclonal antibody designed for the treatment of influenza a. diridavumabmonoclonal antibodytype?sourcehumantargethemagglutininclinical dataother namescr6261atc codenoneidentifierscas number1393659-46-5chemspidernoneuniijfc86a9hl9chemical and physical dataformulac6400h9934n1702o1996s48molar mass144196.67 g·mol−1 this drug was developed by janssen pharmaceutical companies of johnson & johnson.