The carcinogenic metabolite of benzo(a)pyrene has 4 chiral centers. One at carbons 7,8,9, and 10. How many isomers and stereoisomers can be formed. When I worked it, I got 4 isomers and 16 stereoisomers. Is this correct? The reaction occurs through covalent bonds. What would the reaction be between the BaP metabolite and DNA?