Using O=C(CC(=O)Nc1cccc2cccnc12)Nc1cccc2cccnc12, CCCCC(Br)C(=O)OCC to produce CCOC(=O)CCCCCC(C(=O)Nc1cccc2cccnc12)C(=O)Nc1cccc2cccnc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.