InChI=1S/C33H40O20/c34-8-18-21(39)24(42)27(45)31(50-18)48-16-6-13(38)5-15-14(16)7-17(29(47-15)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