Using CC(C)C(=O)Nc1nc2nc[nH]c2c(=O)[nH]1, CCOC(=O)CBr to produce CCOC(=O)Cn1cnc2c(=O)[nH]c(NC(=O)C(C)C)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.