neoplasm-inducing chemical N-nitroso-N-methyl-4-aminobutyric acid 2022-02-03T13:23:56Z 4-[methyl(nitroso)amino]butanoic acid A nitrosamine that has methyl and 3-carboxypropyl substituents. It is a tobacco-derived nitrosamino acid that is a known animal and potential human carcinogen. It induces bladder transitional cell carcinomas in rats and has recently been identified as a contaminant in certain blood pressure medications. N-nitrosomethylaminobutyric acid N-nitrosomethylbenzylamine NMBA PMID:32123074 XCO:0000919 experimental_condition_ontology pubchem.compound:13643 slaulede