You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3R)-5-butyl-3-hydroxy-3-(trifluoromethyl)-1H-pyrazol-2-yl]-2-(5-methyl-2-propan-2-ylphenoxy)ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H27F3N2O3
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