Using CCOC(=O)C(CC)(C(=O)OCC)c1ccc(C(=O)c2cccs2)cc1 to produce CCC(C(=O)O)c1ccc(C(=O)c2cccs2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.