Using O=Cc1cccn1CC(=O)O, CC(=O)OCC1=C(C(=O)OC(C)(C)C)N2C(=O)C(N)C2SC1 to produce CC(=O)OCC1=C(C(=O)OC(C)(C)C)N2C(=O)C(NC(=O)Cn3cccc3C=O)C2SC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.