Situation for Researches on Chemical Carcinogens and on Mechanism of Chemical Carcinogenesis

The recent situation for the researches on chemical carcinogens and on the mechanism of chemical carcinogenesis is reviewed in this paper. Recently, the author of this paper has suggested a quantitative molecular orbital model——"di-regions theory" for the chemical structure-carcinogenic activity relationship. A brief discussion about this theory and its further progress is given in this review.