You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(4aR,8aR)-7-[(5-fluoro-2-methoxyphenyl)methyl]-4a-hydroxy-3,4,5,6,8,8a-hexahydro-1H-2,7-naphthyridin-2-yl]-cyclopentylmethanone by IUPAC nomenclature, provide its molecular formula.
user
C22H31FN2O3
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