You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (4aR,8aS)-4a-(pyridin-2-yloxymethyl)-6-(1,3-thiazol-2-ylmethyl)-3,4,5,7,8,8a-hexahydro-2H-pyrano[3,2-c]pyridine is given. What is its corresponding molecular formula?
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C18H23N3O2S
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