InChI=1S/C31H36O19/c1-45-29(44)18(10-13-2-5-14(33)15(34)8-13)46-20(35)7-4-12-3-6-16(47-31-26(41)23(38)24(39)27(50-31)28(42)43)17(9-12)48-30-25(40)22(37)21(36)19(11-32)49-30/h2-9,18-19,21-27,30-34,36-41H,10-11H2,1H3,(H,42,43)/b7-4-