Using CCCCOC(=O)C(NC(=O)OC(C)(C)C)OC(C)=O, COc1ccccc1 to produce CCCCOC(=O)C(NC(=O)OC(C)(C)C)c1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.