as model-mutagens were used : the nitrosamines dimethylnitrosamine ( dmn ) and diethylnitrosamine ( den ) , the triazenes 1- ( 2,4,6-trichlorophenyl ) -3,3-dimethyltriazene ( cl3pdmt ) , 1- ( 3-pyridyl ) -3,3-dimethyltriazene ( pydmt ) and dacarbazine ( dtic ) , the hydrazines procarbazine ( pcz ) , 1,1-dimethylhydrazine ( 1,1-dmh ) and 1,2-dimethylhydrazine ( 1,2-dmh ) as well as the pyrrolizidine alkaloid seniciphylline ( sph ) .
C0028197
nitrosamines
C0012200
diethylnitrosamine