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 (5S)-2-(2,4-dichloroanilino)-N-(2-methoxy-4-nitrophenyl)-4,7-dioxo-3,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-5-carboxamide .
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C21H16Cl2N6O6
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