3,9-Dihydroxy-5,6,6a-alpha,6b-beta,11,12,12a-beta,12b-alpha-octahydrodibenzo(a,g)biphenylene 5,6,6a-alpha,6b-beta,11,12,12a-beta,12b-alpha-Octahydrodibenzo(a,g)biphenylene-3,9-diol Dibenzo(a,g)biphenylene-3,9-diol, 5,6,6a-alpha,6b-beta,11,12,12a-beta,12b-alpha-octahydro- HO4990000