Using CCOC(=O)C(C)c1ccc(C=O)cc1, O=S1(=O)CCCC1 to produce CCOC(=O)C(C)c1ccc(C(O)C2CCCS2(=O)=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.