Using N#Cc1nc(-c2cc(Cl)cc(Cl)c2Cl)c(N)nc1N, CO to produce Nc1nc(N)c(-c2cc(Cl)cc(Cl)c2Cl)nc1C=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.