InChI=1S/C16H26O9/c1-16(2,8-6-4-3-5-7-9(17)18)25-15-12(21)10(19)11(20)13(24-15)14(22)23/h6,8,10-13,15,19-21H,3-5,7H2,1-2H3,(H,17,18)(H,22,23)/b8-6+