You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by N-(3,5-dichlorophenyl)-2-[[4-ethyl-5-(4-fluorophenyl)-1,2,4-triazol-3-yl]sulfanyl]acetamide ?
user
C18H15Cl2FN4OS
assistant