InChI=1S/C33H36O20/c1-8-20(38)24(42)29(52-32-26(44)22(40)19(37)9(2)49-32)28(48-8)18-13(36)7-16-17(21(18)39)12(35)6-14(50-16)10-3-4-11(34)15(5-10)51-33-27(45)23(41)25(43)30(53-33)31(46)47/h3-9,19,22-30,32-34,36-37,39-45H,1-2H3,(H,46,47)