InChI=1S/C25H28O13/c1-4-10(2)23(33)36-19-14-12(7-5-11-6-8-13(27)35-18(11)14)34-21(19)25(3,9-26)38-24-17(30)15(28)16(29)20(37-24)22(31)32/h4-8,15-17,19-21,24,26,28-30H,9H2,1-3H3,(H,31,32)/b10-4+