InChI=1S/C20H21F2N3O4/c21-20(22)11-15(19(29)23-8-3-4-9-23)25(12-20)16(26)7-10-24-17(27)13-5-1-2-6-14(13)18(24)28/h1-2,5-6,15H,3-4,7-12H2/t15-/m0/s1