Prepn: E. T. McBee et al., Ind. Eng. Chem. 39, 378 (1947); J. A. Godsell et al., Nature 178, 199 (1956). Toxicology: C. F. B. Nhachi, Toxicology 39, 317 (1986). Mechanistic study of metabolite formation: I. M. C. M. Rietjens, J. Vervoort, Chem. Res. Toxicol. 5, 10 (1992).