Using CCCC1(O)c2c(ccc(C(C)=O)c2O)OC1(O)COc1ccc(CC(=O)OC)cc1 to produce CCCC1c2c(ccc(C(C)=O)c2O)OC1COc1ccc(CC(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.