You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 4-(4-chlorophenyl)-6-[[5-(4-methylphenyl)tetrazol-2-yl]methyl]-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21ClN6O3
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