Using CCOC(=O)C1CC2(CCC2)ON1C(=O)C(NC(=O)OC)C(C)C to produce COC(=O)NC(C(=O)N1OC2(CCC2)CC1C(=O)O)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.