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-[4-[[2-[(1-cyanocyclohexyl)amino]-2-oxoethyl]amino]phenyl]prop-2-enoate is given. What is its corresponding molecular formula?
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C20H25N3O3
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