Using CCOC(=O)CC(NC(=O)C1CC(=O)N(c2cccc(NC3=NCCS3)c2)C1)c1cccnc1 to produce O=C(O)CC(NC(=O)C1CC(=O)N(c2cccc(NC3=NCCS3)c2)C1)c1cccnc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.