白消安产品是Busulfan is a bifunctional alkylating agent, having a selective immunosuppressive effect on bone marrow. Busulfan causes DNA damage by cross-linking DNA and proteins. Causes double-base lesions mainly at 5'-GA-3' and, to a lesser extent, at 5'-GG-3' sequences. Forms an intrastrand cross-link at the 5'-GA-3' sequence, and to monoalkylation. Induces normal human fibroblast senescence selectively through Erk and p38 pathways.