You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[5-methyl-4-[(4-methylsulfonylpiperazin-1-yl)methyl]furan-2-yl]methyl]ethanamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H25N3O3S
assistant