You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-[5-(hydrazinecarbonyl)-4-methyl-3-oxo-1H-thieno[2,3-c]pyrazol-2-yl]-5,5-dimethyl-7-oxo-4,6-dihydro-1-benzothiophene-3-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H22N4O5S2
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