You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[1-[(5-phenyl-1,3,4-oxadiazol-2-yl)methyl]pyrrolidin-2-yl]cyclohexan-1-ol is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H25N3O2
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