You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-(methylamino)-2-[(2E,4Z)-2-methyl-5-(methylideneamino)octa-2,4-dienyl]-3H-pyrrolo[3,4-c]pyridin-1-one into its molecular formula.
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C18H24N4O
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