Using CCOC(=O)COc1ccc(C(=O)CCc2sc3ccccc3c2C)cc1C to produce Cc1cc(C(=O)CCc2sc3ccccc3c2C)ccc1OCC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.