You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-(6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl)phenyl]-3-methyl-2-[(2-phenylacetyl)amino]butanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H29N3O2S
assistant