InChI=1/C33H40O20/c1-10-21(39)24(42)27(45)31(48-10)47-9-20-23(41)26(44)30(53-32-28(46)25(43)22(40)19(8-34)51-32)33(52-20)50-18-7-13-15(37)5-12(35)6-17(13)49-29(18)11-2-3-14(36)16(38)4-11/h2-7,10,19-28,30-34,39-46H,8-9H2,1H3,(H3-,35,36,37,38)/p+1