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)-3-[6-(cyclopropylmethoxy)pyridin-3-yl]oxy-1-(2-methylbenzotriazol-5-yl)pyrrolidin-2-one is given. What is its corresponding molecular formula?
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C20H21N5O3
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