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 N-[(3,5-difluorophenyl)methyl]-2-[2,6-dihydroxy-5-(hydroxymethyl)-5,8a-dimethyl-1,2,3,4,4a,6,7,8-octahydronaphthalen-1-yl]acetamide is given. What is its corresponding molecular formula?
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C22H31F2NO4
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