You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(4-acetamidophenoxy)methyl]-N-[(4-fluorophenyl)methyl]-1,2,4-oxadiazole-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H17FN4O4
assistant