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