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 N-[(3Z,4E)-3-ethylidene-4-prop-2-enylidene-7,8-dihydronaphthalen-1-yl]-2-methylprop-2-enamide is given. What is its corresponding molecular formula?
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C19H21NO
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