You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3,4,5-trimethoxyphenyl)-5-(1,3,5-trimethylpyrazol-4-yl)thiophene-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H23N3O4S
assistant