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 (6-cyclopropyl-3-methyl-[1,2]oxazolo[5,4-b]pyridin-4-yl)-(4-pyridin-2-ylpiperazin-1-yl)methanone is given. What is its corresponding molecular formula?
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C20H21N5O2
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