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