InChI=1S/C15H26O8/c1-3-4-5-9(16)6-8(2)7-22-15-12(19)10(17)11(18)13(23-15)14(20)21/h6,9-13,15-19H,3-5,7H2,1-2H3,(H,20,21)/b8-6-