Using COc1ccc(C(Sc2c(N)ccc3ccccc23)C(O)C(=O)O)cc1 to produce COc1ccc(C2Sc3c(ccc4ccccc34)NC(=O)C2O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.