You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[[(3R)-2,3-dihydro-1,4-benzodioxin-3-yl]methyl]-3-(1,4-dioxo-3H-phthalazin-2-yl)propanamide into its molecular formula.
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C20H19N3O5
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