Using COC(=O)Cc1cc(O)c(C(C)(C)C)cc1C, CCCCCCCCO to produce CCCCCCCCOC(=O)Cc1cc(O)c(C(C)(C)C)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.