1) Dmn 
<chemical> N-nitrosodimethylamine. A nitrosamine derivative with alkylating, carcinogenic, and mutagenic properties. It causes serious liver damage and is a hepatocarcinogen in rodents. ... Pharmacological action: alkylating agents, carcinogens, mutagens. ... Chemical name: Methanamine, N-methyl-N-nitroso- ... (12 Dec 1998) ... 
a yellow, water-soluble carcinogenic liquid, CHNO, found in tobacco smoke and certain foods: known to be a potent carcinogen. Abbr.: DMN, DMNA