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