InChI=1S/C25H28O6/c1-6-25(4,5)16-9-15(17(26)10-19(16)28)21-12-20(29)23-22(31-21)11-18(27)14(24(23)30)8-7-13(2)3/h6-7,9-11,21,26-28,30H,1,8,12H2,2-5H3