Nitrogen mustards: such as mechlorethamine (nitrogen mustard), chlorambucil, Cyclophosphamide (Cytoxan), ifosfamide, and melphalan
Nitrosoureas:streptozocin, carmustine (BCNU), and lomustine
Alkyl sulfonates: busulfan
Triazines: dacarbazine (DTIC) and temozolomide (Temodar)
Ethylenimines: thiotepa and altretamine (hexamethylmelamine)
The platinum drugs (cisplatin, carboplatin, and oxalaplatin) are sometimes grouped with alkylating agents because they kill cells in a similar way.