InChI=1S/C33H40O18/c1-11-19(36)23(40)26(43)31(46-11)45-10-18-22(39)25(42)30(51-32-27(44)24(41)20(37)12(2)47-32)33(49-18)50-29-21(38)14-5-3-4-6-17(14)48-28(29)13-7-8-15(34)16(35)9-13/h3-9,11-12,18-20,22-27,30-37,39-44H,10H2,1-2H3