Using Cc1cn(-c2cc(C#N)c(N)c(C(F)(F)F)c2)c(C)n1, CO to produce Cc1cn(-c2cc(C=O)c(N)c(C(F)(F)F)c2)c(C)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.