Using O=C(NC(=S)NC1(C(F)(F)CO)c2cc(Br)ccc2OCC12CC2)c1ccccc1 to produce NC(=S)NC1(C(F)(F)CO)c2cc(Br)ccc2OCC12CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.