You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name ethyl (4S)-6-amino-5-cyano-2-[(3-cyano-6-ethyl-5-methylpyridin-2-yl)sulfanylmethyl]-4-thiophen-2-yl-4H-pyran-3-carboxylate into its molecular formula.
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C23H22N4O3S2
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