Using O=C(Nc1cc(Cl)c2c(c1)CN(C(=O)C(F)(F)F)CC2)c1ccc(Cl)s1 to produce O=C(Nc1cc(Cl)c2c(c1)CNCC2)c1ccc(Cl)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.