InChI=1S/C22H26O10/c1-9-13-15(30-20(27)22(5)10(2)31-22)14(28-11(3)23)12(18(24)25)7-6-8-21(4)17(32-21)16(13)29-19(9)26/h7,10,13-17H,1,6,8H2,2-5H3,(H,24,25)/b12-7+