InChI=1/C11H11F2NO4/c12-11(13)17-9-2-1-6(3-10(9)18-11)14-7-4-16-5-8(7)15/h1-3,7-8,14-15H,4-5H2/t7-,8-/m1/s1 7552B876F900D449