InChI=1S/C27H30O13/c1-12(6-8-37-22-13-4-5-18(28)38-16(13)10-15-14(22)7-9-36-15)17(11-27(2,3)26(34)35)39-25-21(31)19(29)20(30)23(40-25)24(32)33/h4-7,9-10,17,19-21,23,25,29-31H,8,11H2,1-3H3,(H,32,33)(H,34,35)/b12-6+