You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(3-methoxyphenyl)phenyl]-N-methyl-N-[4-methyl-5-(methylsulfamoyl)-1,3-thiazol-2-yl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H23N3O4S2
assistant