You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (3aR,5R,6S,7R,7aR)-5-(hydroxymethyl)-2-[methyl(prop-2-enyl)amino]-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d][1,3]thiazole-6,7-diol into molecular formula.
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C11H18N2O4S
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