Ricin (blocked) conjugated murine MCA (n901) April 12, 2017 Ricin (blocked) conjugated murine MCA (n901) Trade Name Orphan Indication Small cell lung cancer USA Market Approval USA USA Designation Date 1991-01-25 00:00:00 Sponsor ImmunoGen, Inc.;830 Winter Street;Waltham, Massachusetts, 02451