(+/-)-Benzo(a)pyrene-9,10-diol-7,8-epoxide,syn 58116-22-6 Benzo(10,11)chryseno(1,2-b)oxirene-8,9-diol, 6b,7a,8,9-tetrahydro-, (6b-alpha,7a-alpha,8-alpha,9-beta)-(+-)-