Using OCCCBr, Cc1cccc(O)c1N(C)C(=O)c1ccc(Cl)c(Br)c1 to produce Cc1cccc(OCCCO)c1N(C)C(=O)c1ccc(Cl)c(Br)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.