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