C18H14ClFN4O4

Exact Mass: 404.07

Mol. Wt.: 404.78

m/e: 404.07 (100.0%), 406.07 (33.1%), 405.07 (21.1%), 407.07 (6.4%), 406.08 (1.9%)

C, 53.41; H, 3.49; Cl, 8.76; F, 4.69; N, 13.84; O, 15.81