InChI=1S/C21H21F4NO4/c1-3-13(20(28)29)8-12-4-7-18(30-2)14(9-12)11-26-19(27)16-6-5-15(10-17(16)22)21(23,24)25/h4-7,9-10,13H,3,8,11H2,1-2H3,(H,26,27)(H,28,29)/t13-/m0/s1