InChI=1S/C16H20O9/c1-2-7(14(20)21)8-5-3-4-6-9(8)24-16-12(19)10(17)11(18)13(25-16)15(22)23/h3-7,10-13,16-19H,2H2,1H3,(H,20,21)(H,22,23)