<unk>  is an alkylating agent that is FDA approved for the treatment of germ cell testicular cancer. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include alopecia, nausea and vomiting, leukopenia, anemia, CNS toxicity, hematuria, and infection.
Ifosfamide
Mafosfamide
Lomustine
Mitomycin 
Vincristine sulfate
Dihydroergocristine
Semustine
Fotemustine