1a,10,11,11a-Tetrahydrobenzo(6,7)phenanthro(1,2-b)oxirene-10,11-diol (1aalpha,10beta,11alpha,11aalpha)- 76094-81-0 Benzo(6,7)phenanthro(1,2-b)oxirene-10,11-diol, 1a,10,11,11a-tetrahydro-, (1aalpha,10beta,11alpha,11aalpha)-