You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (E)-3-[4-chloro-2-[(5-methyltetrazol-2-yl)methyl]phenyl]-1-[4-(2-methyl-1,3-oxazol-4-yl)piperidin-1-yl]prop-2-en-1-one into its molecular formula.
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C21H23ClN6O2
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