You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 2-ethyl-4-[[3-[5-(trifluoromethyl)-1H-pyrazol-4-yl]imidazo[1,2-a]pyrazin-8-yl]amino]benzoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H17F3N6O2
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