Using COC(=O)[C@H](CCC(=O)NCCOCCOCCNC(=O)OC(C)(C)C)NC(=O)c1ccc(NCc2cnc3nc(N)nc(O)c3n2)cc1 to produce NCCOCCOCCNC(=O)CC[C@H](NC(=O)c1ccc(NCc2cnc3nc(N)nc(O)c3n2)cc1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.