InChI=1S/C16H28O8/c1-9(6-8-17)5-4-7-16(2,3)24-15-12(20)10(18)11(19)13(23-15)14(21)22/h4,7,9-13,15,17-20H,5-6,8H2,1-3H3,(H,21,22)/b7-4+