Using Nc1ccc2c(c1)C(=C1C(=O)Nc3ccccc31)OC2, OCCCBr to produce O=C1Nc2ccccc2C1=C1OCc2ccc(NCCCO)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.