Using S=C(n1ccnc1)n1ccnc1, CCOC(=O)CN(C)c1ccc(N=O)cc1 to produce CCOC(=O)CN(C)c1ccc(N=C=S)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.