Using CC1(COS(C)(=O)=O)CCCN(CC2COc3ccccc3O2)C1, OCC(F)(F)F to produce CC1(COCC(F)(F)F)CCCN(CC2COc3ccccc3O2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.