InChI=1S/C17H18O8/c1-24-12-4-10(21)13(8(5-18)11(22)6-19)16-15(12)7-2-3-9(20)14(7)17(23)25-16/h4,8,11,18-19,21-22H,2-3,5-6H2,1H3