InChI=1S/C26H28O7/c1-13-6-5-9-26(2,3)17(13)12-16-15(7-8-18(28)22(16)30)24-25(32-4)23(31)21-19(29)10-14(27)11-20(21)33-24/h6-8,10-11,17,27-30H,5,9,12H2,1-4H3/t17-/m1/s1