You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule ethyl (4R,5R)-2-[4-(4-chlorophenyl)piperazin-1-yl]-4-(3,4-dimethoxyphenyl)-6-oxo-4,5-dihydro-1H-pyrimidine-5-carboxylate .
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