Using CCOC(=O)/C=C(/C)c1ccc2c(c1)CCN2C(=O)OC(C)(C)C to produce CCOC(=O)CC(C)c1ccc2c(c1)CCN2C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.