InChI=1S/C15H22O9/c1-2-7-8(22-7)5-3-4-6-9(16)23-15-12(19)10(17)11(18)13(24-15)14(20)21/h4,6-8,10-13,15,17-19H,2-3,5H2,1H3,(H,20,21)/b6-4+