You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[5-(2-ethyl-4-morpholin-4-ylphenyl)pyridin-2-yl]-N-[(3-fluorophenyl)methyl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C26H28FN3O2
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