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 N-butan-2-yl-N-[2-[4-(4-chlorophenyl)-6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl]-2-oxoethyl]-3-methoxybenzamide ?
user
C27H29ClN2O3S
assistant