Using COC(=O)c1c(CN=[N+]=[N-])c(-c2ccccc2)nc2ccccc12 to produce [N-]=[N+]=NCc1c(-c2ccccc2)nc2ccccc2c1C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.