Using CCOP(=O)(CC(CC(C)C)C(=O)N[C@@H](CC(C)C)C(=O)NC)CN1C(=O)CNC1=O to produce CNC(=O)[C@H](CC(C)C)NC(=O)C(CC(C)C)CP(=O)(O)CN1C(=O)CNC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.