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-bromo-N-[2-[[2-(2-methoxyethoxy)pyridin-3-yl]amino]-2-oxoethyl]-N-methylthiophene-2-carboxamide .
user
C16H18BrN3O4S
assistant