You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2-ethoxyphenyl)-2-(9-fluoro-3-oxo-[1,2,4]triazolo[4,3-c]quinazolin-2-yl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H16FN5O3
assistant