InChI=1S/C15H22O9/c1-2-3-4-5-8(6-7-9(16)17)23-15-12(20)10(18)11(19)13(24-15)14(21)22/h3-4,6-8,10-13,15,18-20H,2,5H2,1H3,(H,16,17)(H,21,22)/b4-3-,7-6+