Using CCOC(=O)N=C=S, Nc1nc(SCc2cccc(F)c2F)nc(N)c1N to produce CCOC(=O)Nc1nc2c(N)nc(SCc3cccc(F)c3F)nc2[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.