Using CCOC(=O)CBr, Cc1c(CO)cn2ncc(C#N)c(Nc3ccc(Oc4ccccc4)cc3)c12 to produce CCOC(=O)COCc1cn2ncc(C#N)c(Nc3ccc(Oc4ccccc4)cc3)c2c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.