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