Which of the following are alkylating agents:

ALKYLATI NG AGE NTS These compounds produce highly reactive carbonium ion intermediates which transfer alkyl groups to cellular macromolecules by forming covalent bonds. The position 7 of guanine residues in DNA is especially susceptible, but other molecular sites are also involved. Alkylation results in cross linking/ abnormal base pairing/ scission of DNA strand. Cross linking of nucleic acids with proteins can also take place. >Mechlorethamine (Mustine HCL) >Cyclophosphamide >Ifosfamide >Chlorambucil >Melphalan >Thio-TEPA >Busulfan >Nitrosoureas >Dacarbazine(DTIC) ESSENTIALS OF MEDICAL PHARMACOLOGY K.D.TRIPATHI SIXTH EDITION PAGE NO:821,822