You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [4-(cyclopropylmethylamino)-7H-pyrrolo[2,3-d]pyrimidin-5-yl]-[2,6-difluoro-3-(propylsulfanylamino)phenyl]methanone is given. What is its corresponding molecular formula?
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C20H21F2N5OS
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