InChI=1S/C15H24O8/c1-2-3-4-5-6-7-9(16)8-22-15-12(19)10(17)11(18)13(23-15)14(20)21/h4-5,10-13,15,17-19H,2-3,6-8H2,1H3,(H,20,21)/b5-4+