InChI=1S/C26H30O15/c27-9-16-17(30)18(31)21(34)25(40-16)39-14-6-10(5-12(28)7-14)1-2-11-3-4-13(8-15(11)29)38-26-22(35)19(32)20(33)23(41-26)24(36)37/h1-8,16-23,25-35H,9H2,(H,36,37)/b2-1+