InChI=1S/C33H40O20/c34-8-18-21(39)24(42)27(45)31(50-18)47-13-5-15(38)14-7-17(29(48-16(14)6-13)11-1-3-12(37)4-2-11)49-33-30(26(44)23(41)20(10-36)52-33)53-32-28(46)25(43)22(40)19(9-35)51-32/h1-7,18-28,30-36,39-46H,8-10H2,(H-,37,38)/p+1