You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[5-[2-amino-4-methyl-8-(1-methylpiperidin-4-yl)oxyquinazolin-6-yl]-2-methoxypyridin-3-yl]-2,4-difluorobenzenesulfonamide into molecular formula.
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C27H28F2N6O4S
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