You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[1-methyl-5-(methylamino)-6-oxopyridin-3-yl]-4-(4-methylphenoxy)phenyl]ethenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H23N3O4S
assistant