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