You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (4aS,8aR)-4a-(pyridin-3-ylmethoxymethyl)-6-(1,3-thiazol-2-ylmethyl)-3,4,5,7,8,8a-hexahydro-2H-pyrano[3,2-c]pyridine into molecular formula.
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C19H25N3O2S
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