Using COc1cc2c(Oc3ccc4[nH]ccc4c3)ncnc2cc1O, BrCCCBr to produce COc1cc2c(Oc3ccc4[nH]ccc4c3)ncnc2cc1OCCCBr, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.