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 2-[[4-amino-5-(4-fluorophenyl)-1,2,4-triazol-3-yl]sulfanyl]-N-[2-(4-fluorophenyl)ethyl]acetamide .
user
C18H17F2N5OS
assistant