Using CCOC(=O)/C=C/CC1c2ccc(C#N)c(C)c2CCN1C(=O)OC(C)(C)C to produce CCOC(=O)CCCC1c2ccc(C#N)c(C)c2CCN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.