InChI=1S/C27H30O12/c1-13(7-10-36-22-14-4-5-18(28)37-17(14)12-16-15(22)8-11-35-16)6-9-27(2,3)26(34)39-25-21(31)19(29)20(30)23(38-25)24(32)33/h4-5,7-8,11-12,19-21,23,25,29-31H,6,9-10H2,1-3H3,(H,32,33)/b13-7+