You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-[4-(2,4-dichlorophenyl)-4-methyl-2,5-dioxoimidazolidin-1-yl]-N-(2,3-dihydro-1,4-benzodioxin-6-ylcarbamoyl)acetamide ?
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C21H18Cl2N4O6
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