You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 7-[[dimethyl(oxo)-lambda6-sulfanylidene]amino]-N-[4-fluoro-2-[(5-methyl-1,2-oxazol-3-yl)methoxy]phenyl]-5-methylquinazolin-4-amine by IUPAC nomenclature, provide its molecular formula.
user
C22H22FN5O3S
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