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 5-[1-chloro-2-(3-nitrophenyl)ethenyl]-N-[(4-fluorophenyl)methyl]-1,3,4-thiadiazole-2-carboxamide .
user
C18H12ClFN4O3S
assistant