Using OCCCI, O=C(O)CCCC[C@@H]1SC[C@@H]2NC(=O)N[C@@H]21 to produce O=C1NC2CSC(CCCCC(=O)OCCCI)C2N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.