You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-phenyl-N-[[6-[2-[(2,2,2-trifluoroacetyl)amino]acetyl]pyridin-3-yl]methyl]morpholine-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H21F3N4O4
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