You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[2-(4-bromothiophen-2-yl)-1,3-thiazol-4-yl]-N-(1-ethylbenzimidazol-2-yl)acetamide into its molecular formula.
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C18H15BrN4OS2
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