Using COB(OC)OC, C[C@@H]1CCCC[C@H]1NC(=O)[C@@H]1C[C@H]1C(=O)O to produce C[C@H]1CC[C@H](NC(=O)[C@@H]2C[C@H]2CO)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.