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 [4-[(R)-(4-fluorophenyl)-hydroxymethyl]piperidin-1-yl]-[(3R)-4-methylmorpholin-3-yl]methanone is given. What is its corresponding molecular formula?
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C18H25FN2O3
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