nitrosamines

nitrosamines
Amines substituted by a nitroso (NO) group, usually on a nitrogen atom, to yield N-n. (R–NH–NO or R2N–NO); can be formed by direct combination of an amine and nitrous acid (can be formed from nitrites in the acidic gastric juice); some are mutagenic and/or carcinogenic.

Medical dictionary. 2011.

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