You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 7,7a-dimethyl-2-[4-[(1-oxidopiperidin-1-ium-1-yl)methyl]anilino]-3,5,8,11b-tetrahydropyrimido[5,4-d][1]benzazepin-6-one into its molecular formula.
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C26H33N5O2
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