You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[(S)-(3,4-dimethoxyphenyl)-(4-methylpiperazin-1-yl)methyl]-5-ethylthiophen-2-yl]furan-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H31N3O4S
assistant