InChI=1S/C16H26O8/c1-8(4-5-9-16(2,3)24-9)6-7-22-15-12(19)10(17)11(18)13(23-15)14(20)21/h6,9-13,15,17-19H,4-5,7H2,1-3H3,(H,20,21)/b8-6-