Farletuzumab (MORAb-003) is a monoclonal antibody which is being investigated for the treatment of ovarian cancer.'-mexi-' (melanoma): Ecromeximab§ Farletuzumab (MORAb-003) is a monoclonal antibody which is being investigated for the treatment of ovarian cancer. This drug was developed by Morphotek, Inc. It is targeted at FR-alpha which is overexpressed in some cancers such as ovarian cancer.