You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-[(3,5-dimethylpyrazol-1-yl)methyl]pyrrolidin-1-yl]-4-(3-methyl-1,2,4-oxadiazol-5-yl)butan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H25N5O2
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