You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [4-(4-bromo-5-chlorothiophen-2-yl)sulfonylpiperazin-1-yl]-[7-(3,4-dichlorophenyl)-5-methyl-4,7-dihydropyrazolo[1,5-a]pyrimidin-6-yl]methanone by IUPAC nomenclature, provide its molecular formula.
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C22H19BrCl3N5O3S2
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