Using COc1cc(OC)c2c(=O)[nH]c(-c3ccc(N4CCNCC4)cc3)nc2c1, OCCBr to produce COc1cc(OC)c2c(=O)[nH]c(-c3ccc(N4CCN(CCO)CC4)cc3)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.