You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(Z)-1-(3,4-dihydro-2H-1,5-benzodioxepin-7-yl)ethylideneamino]-2-(2,4,6-trimethylanilino)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27N3O3
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