Using COc1cccc(OC)c1C(=O)Nc1ccc(OCCNC(=O)OC(C)(C)C)cc1 to produce COc1cccc(OC)c1C(=O)Nc1ccc(OCCN)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.