InChI=1S/C16H20O9/c1-16(7-9(17)18,8-5-3-2-4-6-8)25-15-12(21)10(19)11(20)13(24-15)14(22)23/h2-6,10-13,15,19-21H,7H2,1H3,(H,17,18)(H,22,23)