Using CCOC(=O)/C=C/c1cc2ccccc2n1CC(=O)OC(C)(C)C to produce CCOC(=O)CCc1cc2ccccc2n1CC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.