InChI=1S/C31H38O20/c1-31(45)16(34)7-11-12(27(44)50-30-24(41)21(38)22(39)25(49-30)26(42)43)8-47-28(18(11)31)51-29-23(40)20(37)19(36)15(48-29)9-46-17(35)5-3-10-2-4-13(32)14(33)6-10/h2-6,8,11,15-16,18-25,28-30,32-34,36-41,45H,7,9H2,1H3,(H,42,43)/b5-3+