<unk> (injection) is an alkylating agent that is FDA approved for the treatment of brain tumors (glioblastoma, brainstem glioma, medulloblastoma, astrocytoma, ependymoma, and metastatic brain tumors), multiple myeloma, Hodgkin’s disease, and non-Hodgkin's lymphoma. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include headache, nausea, and vomiting.
Carmustine 
Bendamustine
Lomustine
Fotemustine
Estramustine
Prednimustine
Semustine
Mafosfamide