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What is the molecular formula of the molecule identified by benzyl (3aR,6R,6aS)-6-methyl-4-(2-methylcyclopropanecarbonyl)-5-oxo-3,3a,6,6a-tetrahydro-2H-pyrrolo[3,2-b]pyrrole-1-carboxylate ?
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C20H24N2O4
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