Using Cc1ccc2c(c1)SCC(=O)N2, O=Cc1c[nH]c2ccccc12 to produce Cc1ccc2c(c1)SC(=Cc1c[nH]c3ccccc13)C(=O)N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.