InChI=1S/C16H22O10/c1-7(13(20)21)5-3-4-6-8(2)15(24)26-16-11(19)9(17)10(18)12(25-16)14(22)23/h3-4,6-7,9-12,16-19H,5H2,1-2H3,(H,20,21)(H,22,23)/b4-3+,8-6+