Keywords: کلرو اتیلنیتروسورایر; Alkylating; Chemotherapy; Carcinogen; Laromustine; Nitrosoureas; Sulfonylhydrazines; 2,4-DNPH; 2,4-dinitrophenylhydrazine (Brady's reagent); 4NBP; 4-(4-nitrobenzyl)pyridine; 90CE; 1,2-bis(methylsulfonyl)-1-(2-chloroethyl)hydrazine; BCNU (carmustine); 1,3-