You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-[(R)-[4-bromo-2-(2,2,2-trichloroacetyl)pyrrol-1-yl]-(4-chlorophenyl)methyl]but-3-en-2-one ?
user
C17H12BrCl4NO2
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