You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(2,6-difluoro-4-methoxyphenyl)-4-(2-methylimidazo[1,2-a]pyridin-3-yl)-1,3-thiazol-2-amine;hydrobromide by IUPAC nomenclature, provide its molecular formula.
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C18H15BrF2N4OS
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