1a,2,3,11b-Tetrahydro-4-methylbenz(7,8)anthra(1,2-b)oxirene-2,3-diol 57456-67-4 7-Methylbenz(a)anthracene-8,9-dihydrodiol 10,11-oxide Benz(7,8)anthra(1,2-b)oxirene-2,3-diol, 1a,2,3,11b-tetrahydro-4-methyl-