Using COc1cc(C#CCCCN2C(=O)c3ccccc3C2=O)cc(OC2CCN(C(=O)OC(C)(C)C)CC2)c1 to produce COc1cc(C#CCCCN)cc(OC2CCN(C(=O)OC(C)(C)C)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.