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/h2-4,6,9-13,15-19H,5,7-8H2,1H3,(H,20,21)/b3-2+,6-4+