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 [(3R)-8-methoxy-3,4-dihydro-2H-chromen-3-yl]-(3-methyl-6,8-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrazin-7-yl)methanone is given. What is its corresponding molecular formula?
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C17H20N4O3
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