You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-(2-fluoro-5-nitrophenyl)-2-[[5-(2-fluorophenyl)-4-(2-methylpropyl)-1,2,4-triazol-3-yl]sulfanyl]acetamide ?
user
C20H19F2N5O3S
assistant