Using COC(=O)N1CCC(c2c(C(=O)O)sc3cc(C(F)(F)F)ccc23)CC1 to produce COC(=O)N1CCC(c2csc3cc(C(F)(F)F)ccc23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.