Using COC(=O)c1ccc(C(CC(C)C)Oc2ccc(Br)c(C3OCCCO3)c2)cc1 to produce CC(C)CC(Oc1ccc(Br)c(C2OCCCO2)c1)c1ccc(C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.