You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(Z)-N-[(4-methoxy-3,5-dimethylpyridin-2-yl)methyl]-N-methyl-3-thiophen-3-ylprop-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H20N2O2S
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