You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-(2-fluoro-4-methylphenyl)-2-[4-[5-(4-fluorophenyl)-1,2,4-oxadiazol-3-yl]-2-methylimidazol-1-yl]acetamide .
user
C21H17F2N5O2
assistant