InChI=1S/C27H30O16/c28-7-17-20(33)22(35)24(37)26(42-17)39-8-18-21(34)23(36)25(38)27(43-18)40-10-4-13(31)19-14(32)6-15(41-16(19)5-10)9-1-2-11(29)12(30)3-9/h1-6,17-18,20-31,33-38H,7-8H2