3,6-phenanthrenediol, 9-methoxy-1,7-dimethyl- 9-methoxy-1,7-dimethylphenanthrene-3,6-diol InChI=1/C17H16O3/c1-9-4-11(18)6-13-12(9)8-17(20-3)15-5-10(2)16(19)7-14(13)15/h4-8,18-19H,1-3H