Using O=C(C(F)(F)F)C(F)(F)F, CCc1ocnc1-c1ccc(SC)cc1 to produce CCc1oc(C(O)(C(F)(F)F)C(F)(F)F)nc1-c1ccc(SC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.