ST1-RTA immunotoxin (SR 44163) January 19, 2018 ST1-RTA immunotoxin (SR 44163) Trade Name Orphan Indication Patients with B-chronic lymphocytic leukemia USA Market Approval USA USA Designation Date 1987-08-12 00:00:00 Sponsor Sanofi Winthrop, Inc.;9 Great Valley Parkway;Malvern, PA, 19355