Using COc1ccc2[nH]c(CCOc3ccc(C=C4SC(=O)NC4=O)cc3)cc2c1 to produce COc1ccc2[nH]c(CCOc3ccc(CC4SC(=O)NC4=O)cc3)cc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.