You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name methyl 2-[4-[C-methyl-N-[2-[(5-methyl-1H-imidazol-4-yl)methylsulfanyl]ethyl]carbonimidoyl]-2-(4-nitrophenyl)-3-oxo-1H-pyrazol-5-yl]acetate into its molecular formula.
user
C21H24N6O5S
assistant