You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-(4-chlorophenyl)-5,5-dioxo-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]-2-(4-ethylpiperazin-1-yl)-2-oxoacetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H22ClN5O4S
assistant