InChI=1S/C16H26O8/c1-9(2)7-5-3-4-6-8-10(17)23-16-13(20)11(18)12(19)14(24-16)15(21)22/h5,7,9,11-14,16,18-20H,3-4,6,8H2,1-2H3,(H,21,22)/b7-5+