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-[5-[2-[[5-(3-bromoanilino)-1,3,4-thiadiazol-2-yl]sulfanyl]acetyl]thiophen-2-yl]ethyl]acetamide .
user
C18H17BrN4O2S3
assistant