Using Cc1c(C(=O)Nc2ccc(N3CCNCC3)c(C#N)c2)cnn1-c1ccc(Cl)cc1, OCCCBr to produce Cc1c(C(=O)Nc2ccc(N3CCN(CCCO)CC3)c(C#N)c2)cnn1-c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.