Using C=C1CC(=O)O1, CC(=O)OCC1=C(C(=O)O)N2C(=O)[C@@H](N)[C@H]2SC1 to produce CC(=O)CC(=O)NC1C(=O)N2C(C(=O)O)=C(COC(C)=O)CS[C@H]12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.