Using O=CO, C[C@@H]([C@@H](O)C1CC1(C)C)N(Cc1ccccc1)Cc1ccccc1 to produce C[C@H](NC(=O)OC(C)(C)C)C(O)C1CC1(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.