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 3-[(2S)-3-[(2R,6R)-2,6-dimethylmorpholin-4-yl]-2-hydroxypropyl]thieno[3,2-d]pyrimidin-4-one is given. What is its corresponding molecular formula?
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C15H21N3O3S
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