InChI=1S/C15H24O8/c1-9(16)7-5-3-2-4-6-8-22-15-12(19)10(17)11(18)13(23-15)14(20)21/h4-7,9-13,15-19H,2-3,8H2,1H3,(H,20,21)/b6-4+,7-5-