You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(3S,4S)-3-[4-(3-bromo-4-chlorobenzoyl)piperazin-1-yl]-4-hydroxypyrrolidin-1-yl]-(4-chlorophenyl)methanone by IUPAC nomenclature, provide its molecular formula.
user
C22H22BrCl2N3O3
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