You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1S,2S,4S)-2-[2-[3-(1H-benzimidazol-2-yl)propyl-methylamino]ethyl]-5-(4-fluorophenyl)bicyclo[2.2.2]oct-5-en-2-ol by IUPAC nomenclature, provide its molecular formula.
user
C27H32FN3O
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