Using O=C(O)c1ccccc1C(=O)c1ccc2sc3ccccc3c2c1 to produce O=C1c2ccccc2C(=O)c2cc3c(cc21)sc1ccccc13, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.