You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-(6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl)-N-[2-(1-phenylpyrazol-4-yl)ethyl]acetamide ?
user
C20H22N4OS
assistant