You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3,4-dimethylphenyl)-N-methyl-4-[5-(piperidine-1-carbonyl)-1,3,4-oxadiazol-2-yl]thiophene-2-sulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H24N4O4S2
assistant