Using CCOC(=O)COc1cc(OC)c2c(c1)OC1(CCCCC1)CC21SCCS1 to produce COc1cc(OCC(=O)O)cc2c1C1(CC3(CCCCC3)O2)SCCS1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.