You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-(2-imidazol-1-ylphenoxy)-N-[(E)-(1,7,7-trimethyl-2-bicyclo[2.2.1]heptanylidene)amino]acetamide into molecular formula.
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C21H26N4O2
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