Using COC(=O)c1cnc(N)s1, O=C(O)c1cn(Cc2ccc(Cl)c(Cl)c2)nn1 to produce COC(=O)c1cnc(NC(=O)c2cn(Cc3ccc(Cl)c(Cl)c3)nn2)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.