You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N'-[2-(3-methyl-2-oxobenzimidazol-1-yl)acetyl]-4-oxo-3-propan-2-ylphthalazine-1-carbohydrazide into its molecular formula.
user
C22H22N6O4
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