Using BrCc1ccccc1, CC(C)(C)OC(=O)n1ccc2c(NC(=O)C3CCNCC3)ccnc21 to produce CC(C)(C)OC(=O)n1ccc2c(NC(=O)C3CCN(Cc4ccccc4)CC3)ccnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.