Using CCOC(=O)c1sc(-c2ccc(C(F)(F)F)cc2)nc1CN1CCOCC1 to produce OCc1sc(-c2ccc(C(F)(F)F)cc2)nc1CN1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.