You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[[(4S)-6,7-dimethoxy-3-methyl-2-methylsulfanyl-3,4-dihydroquinolin-4-yl]oxy]-3-fluoroaniline into its molecular formula.
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C19H21FN2O3S
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