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What is the molecular formula of the molecule identified by N-[(4aS,7aR)-9-hydroxy-3-methyl-7-oxo-2,4,7a,13-tetrahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-4a-yl]-2-bromoacetamide ?
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C19H19BrN2O4
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