You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4,5-dimethyl-3-[(R)-pyridin-4-yl(pyrrolidin-1-yl)methyl]thiophen-2-yl]thiophene-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H23N3OS2
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