InChI=1S/C16H22O11/c1-6(12(20)21)4-3-5-7-16(2,27-7)15(24)26-14-10(19)8(17)9(18)11(25-14)13(22)23/h3,5-11,14,17-19H,4H2,1-2H3,(H,20,21)(H,22,23)/b5-3+