InChI=1S/C25H28O7/c1-13(2)7-8-14-17(30-5)12-19-21(22(14)27)23(28)20-15(9-10-25(3,4)29)24(31-6)16(26)11-18(20)32-19/h7,9-12,26-27,29H,8H2,1-6H3/b10-9+