Using CCOC(=O)C[C@H](NC(=O)CNC(=O)OC(C)(C)C)c1cccnc1 to produce CCOC(=O)C[C@H](NC(=O)CN)c1cccnc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.