Using CCCCS(=O)(=O)NC1Cc2ccc(-c3ccc(=O)n(CC(=O)OCC)n3)cc2C1 to produce CCCCS(=O)(=O)NC1Cc2ccc(-c3ccc(=O)n(CC(=O)O)n3)cc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.