You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(4-chlorophenyl)-3-[4-(dimethylamino)anilino]-2-(3-methyl-1,2-oxazol-5-yl)prop-2-enamide into its molecular formula.
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C21H21ClN4O2
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