You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[2-(2,3-dimethylphenyl)-5,5-dioxo-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]-2-methylbenzamide .
user
C21H21N3O3S
assistant