InChI=1S/C26H30O15/c27-9-16-17(30)18(31)21(34)25(40-16)38-13-4-3-11(15(29)8-13)2-1-10-5-12(28)7-14(6-10)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+