You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (3aS,5S,7aS)-5-(oxan-4-ylmethoxymethyl)-1-(thiophen-2-ylmethyl)-3,3a,5,6,7,7a-hexahydro-2H-pyrano[3,2-b]pyrrole into molecular formula.
user
C19H29NO3S
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