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