Using CN(C)C=O, Cc1c(Br)nc2n1N=C(c1ccccc1)c1cc3c(cc1C2)OCO3 to produce Cc1c(C=O)nc2n1N=C(c1ccccc1)c1cc3c(cc1C2)OCO3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.