InChI=1S/C15H24O8/c1-2-8-9(22-8)6-4-3-5-7-21-15-12(18)10(16)11(17)13(23-15)14(19)20/h3,5,8-13,15-18H,2,4,6-7H2,1H3,(H,19,20)/b5-3+