Using C=CCOC(=O)N[C@H](CSSC[C@@H](N)C(=O)OCC=C)C(=O)OCC=C to produce C=CCOC(=O)N[C@H](CS)C(=O)OCC=C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.