InChI=1S/C31H38O19/c1-31(44)16(32)8-13-14(26(40)41)9-46-28(18(13)31)50-30-23(38)20(35)19(34)15(48-30)10-45-17(33)7-4-11-2-5-12(6-3-11)47-29-24(39)21(36)22(37)25(49-29)27(42)43/h2-7,9,13,15-16,18-25,28-30,32,34-39,44H,8,10H2,1H3,(H,40,41)(H,42,43)/b7-4+