You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(2R)-6-methyl-4-methylsulfonyl-2,3-dihydro-1,4-benzoxazin-2-yl]-(4-methylpiperazin-1-yl)methanone into its molecular formula.
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C16H23N3O4S
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