(1aalpha,7alpha,3beta,11balpha)-1a,2,3,11b-Tetrahydrobenz(5,6)anthra(1,2-b)oxirene-2,3-diol 63493-02-7 Benz(5,6)anthra(1,2-b)oxirene-2,3-diol, 1a,2,3,11b-tetrahydro-, (1aalpha,7alpha,3beta,11balpha)-