You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-[(1,3-dimethylpyrazol-4-yl)carbamothioylamino]-5-phenylthiophene-3-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20N4O2S2
assistant