(+-)-9-alpha,10-beta-Dihydroxy-7-alpha,8-alpha-epoxy-7,8,9,10-tetrahydrobenzo(a)pyrene Benzo(a)pyrene, 7,8,9,10-tetrahydro-9-alpha,10-beta-dihydroxy-7-alpha,8-alpha-epoxy-, (+-)- DJ7960100 reverse-Bpde