Using COc1ccc(-c2cccc3[nH]c(C(=O)NC4CCNCC4)cc23)cn1, OCCBr to produce COc1ccc(-c2cccc3[nH]c(C(=O)NC4CCN(CCO)CC4)cc23)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.