You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[(4-chlorobenzoyl)amino]-N-(6-ethoxy-1,3-benzothiazol-2-yl)-1,3-thiazole-4-carboxamide into its molecular formula.
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C20H15ClN4O3S2
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