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 ethyl (E)-3-[5-[[(3R)-1-(cyclohexylmethyl)pyrrolidin-3-yl]amino]pyrazin-2-yl]prop-2-enoate is given. What is its corresponding molecular formula?
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C20H30N4O2
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