Using COc1ccc(-c2c3c(c[nH]c2=O)Sc2ccccc2N3)cc1 to produce O=c1[nH]cc2c(c1-c1ccc(O)cc1)Nc1ccccc1S2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.