Using [N-]=[N+]=[N-], CC(=O)OCC1=C(C(=O)O)N2C(=O)C(NC(=O)Cc3ccc(CCl)cc3)C2SC1 to produce CC(=O)OCC1=C(C(=O)O)N2C(=O)C(NC(=O)Cc3ccc(CN=[N+]=[N-])cc3)C2SC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.