Using O=C1CSC(=O)N1, COc1ccc(-c2cccc(Oc3ccc(C=O)cc3)c2)cc1 to produce COc1ccc(-c2cccc(Oc3ccc(C=C4SC(=O)NC4=O)cc3)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.