You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[(2-hydroxy-4-oxopent-2-en-3-yl)diazenyl]-N-[(Z)-(4-hydroxyphenyl)methylideneamino]benzamide into its molecular formula.
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C19H18N4O4
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