Using COC(=O)CCCCNC(=O)c1sc2ccc(OC)cc2c1OC(C)C to produce COc1ccc2sc(C(=O)NCCCCC(=O)O)c(OC(C)C)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.