The carcinogenicity of N-( 5-Nitro-2-furfurylidene )-1-aminohydan to in (nitrofurantoin, NF-153) was examined in (C57BL/6N x DBA/2N)F1 (BDF1) mice. Three hundred of mice were divided into three groups, each group consisting about 50 male and 50 female mice. Nitrofurantoin was given in powdered diet at dose levels of 0. 3, 0. 075, or 0 % to the respestive group of mice. The overall incidence of ...