You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-(diethylamino)propyl]-N'-[2-(3-methylphenyl)-4,6-dihydrothieno[3,4-c]pyrazol-3-yl]oxamide is the IUPAC name of a molecule. Please give its molecular formula.
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C21H29N5O2S
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