5-methyl-10,11-dihydro-5H-dibenzo[a,d][7]annulene-2,3,7,8-tetrol 5H-dibenzo[a,d]cycloheptene-2,3,7,8-tetrol, 10,11-dihydro-5-methyl- InChI=1/C16H16O4/c1-8-11-6-15(19)13(17)4-9(11)2-3-10-5-14(18)16(20)7-12(8)10/h4-8,17-20H,2-3H2,1H