Using COC(=O)CC1CCN(c2ccc(NC(=O)c3nnc(Nc4cc(F)c(F)cc4F)o3)cn2)CC1 to produce O=C(O)CC1CCN(c2ccc(NC(=O)c3nnc(Nc4cc(F)c(F)cc4F)o3)cn2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.