InChI=1S/C31H36O19/c1-45-29(44)18(10-13-3-6-15(34)17(9-13)48-31-26(41)23(38)24(39)27(50-31)28(42)43)46-20(35)7-4-12-2-5-14(33)16(8-12)47-30-25(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-