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system
Name the molecular formula for the molecule established as N-[(3R,7S,8aS)-3-methyl-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[2,1-c][1,4]oxazin-7-yl]-3-fluoro-2-methoxybenzamide using the IUPAC nomenclature.
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C16H21FN2O3
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