InChI=1S/C16H26O9/c1-8(2)6-4-3-5-7-9(17)15(23)25-16-12(20)10(18)11(19)13(24-16)14(21)22/h4,6,8-13,16-20H,3,5,7H2,1-2H3,(H,21,22)/b6-4+