You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (3S)-3-[(4-methylphenyl)methylsulfonylmethyl]-7-[4-[3-(trifluoromethyl)phenyl]piperazine-1-carbonyl]-3,4-dihydro-1H-quinoxalin-2-one into molecular formula.
user
C29H29F3N4O4S
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