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 (2E)-5-(2-chlorophenyl)-2-[(2,3-dichlorophenyl)methylidene]-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate .
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C23H17Cl3N2O3S
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