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What is the molecular formula of the compound with this IUPAC name 3-[(4aS,8aS)-1,4-dioxo-4a,5,8,8a-tetrahydro-3H-phthalazin-2-yl]-N-[(1R)-1-cyclopropylethyl]-N-methylbenzamide ?
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C21H25N3O3
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