onartuzumab onartuzumab onartuzumab is a humanized monoclonal antibody designed for the treatment of advanced non-small-cell lung cancer. onartuzumabmonoclonal antibodytypefab fragmentsourcehumanized (from mouse)targetscatter factor receptor kinaseclinical dataatc codenoneidentifierscas number1133766-06-9 nchemspidernoneuniims1j9720wcchemical and physical dataformulac4422h6820n1168o1363s31molar mass99147.88 g·mol−1 ny (what is this?) (verify) onartuzumab was developed by genentech, inc. it is undergoing clinical trials.