Using CN(C)C=O, Brc1ccc2[nH]cc(CCN3CCN(c4nccc5[nH]ccc45)CC3)c2c1 to produce O=Cc1ccc2[nH]cc(CCN3CCN(c4nccc5[nH]ccc45)CC3)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.