Using O=C(O)CN1C(=O)CSC1=S, CCOC(=O)C(=O)c1csc(NC(=O)Nc2ccc(OC)cc2)n1 to produce CCOC(=O)C(=C1SC(=S)N(CC(=O)O)C1=O)c1csc(NC(=O)Nc2ccc(OC)cc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.