Using COC(=O)CC(C)=O, CCNC(=O)c1ccc(N=[N+]=[N-])c(O)c1 to produce CCNC(=O)c1ccc(-n2nnc(C(=O)O)c2C)c(O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.