InChI=1S/C25H28O6/c1-13(2)5-7-16-23-15(9-10-25(3,4)31-23)22(29)21-19(28)12-20(30-24(16)21)14-6-8-17(26)18(27)11-14/h5-6,8,11,20,26-27,29H,7,9-10,12H2,1-4H3/t20-/m0/s1