<qa>  What is the name of the alkylating agent that has been used in the past 66. Cyclophosphamide or any other alkylating agent in the past 6 months prior to randomization Day 1; cyclosporine except for eye drops, tacrolimus, sirolimus, mycophenolate mofetil, azathioprine, or leflunomide in the past 3 months prior to randomization Day 1. 