You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5-cyclohexyl-1H-pyrazol-4-yl)-[(2S)-2-(5-propan-2-yl-1,2-oxazol-3-yl)pyrrolidin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H28N4O2
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