You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[(3-cyano-6-phenyl-4,5,6,7-tetrahydro-1-benzothiophen-2-yl)amino]-2-oxoethyl] pyridine-4-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H19N3O3S
assistant