InChI=1S/C16H22O8/c1-22-10-6-4-9(5-7-10)3-2-8-23-16-13(19)11(17)12(18)14(24-16)15(20)21/h4-7,11-14,16-19H,2-3,8H2,1H3,(H,20,21)