Using C[C@@H](C(=O)O)n1ccccc1=O, CC(C)(C)OC(=O)CC(N)C(O)CF to produce C[C@@H](C(=O)NC(CC(=O)OC(C)(C)C)C(O)CF)n1ccccc1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.