1a,2,3,11c-Tetrahydro-6-methylbenzo(6,7)phenanthro(3,4-b)oxirene-2,3-diol 63057-64-7 Benzo(6,7)phenanthro(3,4-b)oxirene-2,3-diol, 1a,2,3,11c-tetrahydro-6-methyl-