You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance ethyl 2-[[2-[[5-[(4-bromobenzoyl)amino]-1,3,4-thiadiazol-2-yl]sulfanyl]acetyl]amino]acetate .
user
C15H15BrN4O4S2
assistant