You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-(2-chloro-4-morpholin-4-ylsulfonylphenoxy)-1-[4-(2-fluorophenyl)piperazin-1-yl]ethanone into molecular formula.
user
C22H25ClFN3O5S
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