Laboratory of Carcinogen Metabolism, DCCP, National Cancer Institute, NIH, Bethesda, Maryland 20205 U.S.A.
Abstract:
Phenacetin, N-methylacetanilide and N-ethylacetanilide prevented N-2-fluorenylacetamide hepatocarcinogenesis in F344 strain rats. Phenacetin was most effective followed by N-ethylacetanilide. Phenacetin was not carcinogenic when fed at 0.8% level for 16 weeks followed by control diet for another 10 weeks.