You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (3R)-4-[2-chloro-7-[2-(oxan-2-yl)pyrazol-3-yl]thieno[3,2-d]pyrimidin-4-yl]-3-methylmorpholine by IUPAC nomenclature, provide its molecular formula.
user
C19H22ClN5O2S
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