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