Using CCCCBr, CCCCCCc1ccc(-c2nnc(-c3ccc4cc(O)ccc4c3)s2)cc1 to produce CCCCCCc1ccc(-c2nnc(-c3ccc4cc(OCCCC)ccc4c3)s2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.