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