InChI=1S/C16H26O8/c1-8(2)4-5-10(9(3)6-7-17)23-16-13(20)11(18)12(19)14(24-16)15(21)22/h4,6,10-14,16-20H,5,7H2,1-3H3,(H,21,22)/b9-6-