Using O=CNc1cccc(CC(=O)O)n1, Cn1nnnc1SCC1=C(C(=O)O)N2C(=O)C(N)[C@H]2SC1 to produce Cn1nnnc1SCC1=C(C(=O)O)N2C(=O)C(NC(=O)Cc3cccc(NC=O)n3)[C@H]2SC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.