Using CCOC(=O)[C@@H](N)CCSC, O=CN[C@@H](Cc1ccc(F)cc1)C(=O)N[C@@H](Cc1cccc(N(CCCl)CCCl)c1)C(=O)O to produce CCOC(=O)[C@H](CCSC)NC(=O)[C@H](Cc1cccc(N(CCCl)CCCl)c1)NC(=O)[C@H](Cc1ccc(F)cc1)NC=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.