You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-[(4-fluorophenyl)methyl]-3-(imidazol-1-ylmethyl)-1,10-dioxa-7-azaspiro[4.6]undecane is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H24FN3O2
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