Using O=C(O)C(SCCc1ccccc1)C(=O)O, CC(=O)c1cccc(-c2ccccc2)c1 to produce O=c1oc(-c2cccc(-c3ccccc3)c2)cc(O)c1SCCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.