Using [N-]=[N+]=C1C(=O)NC(=O)NC1=O, O=C1CC(=O)NC(=O)N1 to produce O=C1NC(=O)C(N=NC2C(=O)NC(=O)NC2=O)C(=O)N1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.