You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methoxy-3-[2-[5-[(4-methylsulfonylpiperazin-1-yl)methyl]-2-nitrophenyl]ethenyl]quinoline is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H26N4O5S
assistant