InChI=1/C26H28O15/c27-12-7-11(8-14(9-12)39-26-20(33)16(29)18(31)22(41-26)24(36)37)2-1-10-3-5-13(6-4-10)38-25-19(32)15(28)17(30)21(40-25)23(34)35/h1-9,15-22,25-33H,(H,34,35)(H,36,37)/b2-1+