Using O=CC(c1ccccc1)c1ccccc1, NC(=O)c1c(O)sc2ccccc12 to produce O=C(NC=C(c1ccccc1)c1ccccc1)c1c(O)sc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.