Using COc1ccc(CCNC(=O)[C@@H]2CCCN2C(=O)OC(C)(C)C)cc1 to produce COc1ccc(CCNC(=O)[C@@H]2CCCN2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.