InChI=1S/C28H34O16/c1-9-13-18(41-26(37)28(5)10(2)43-28)17(38-11(3)29)12(7-6-8-27(4)21(44-27)19(13)39-23(9)35)24(36)42-25-16(32)14(30)15(31)20(40-25)22(33)34/h7,10,13-21,25,30-32H,1,6,8H2,2-5H3,(H,33,34)/b12-7+