ChEBI: Melphalan is a phenylalanine derivative comprising L-phenylalanine having [bis(2-chloroethyl)amino group at the 4-position on the phenyl ring. It has a role as an antineoplastic agent, a carcinogenic agent, an alkylating agent, an immunosuppressive agent and a drug allergen. It is an organochlorine compound, a nitrogen mustard, a L-phenylalanine derivative and a non-proteinogenic L-alpha-amino acid.NCI Thesaurus (NCIt): Melphalan is a phenylalanine derivative of nitrogen mustard with antineoplastic activity. Melphalan alkylates DNA at the N7 position of guanine and induces DNA inter-strand cross-linkages, resulting in the inhibition of DNA and RNA synthesis and cytotoxicity against both dividing and non-dividing tumor cells.