Using [N-]=[N+]=[N-], O=C(CCl)NCC1CN2C(=O)CC2O1 to produce [N-]=[N+]=NCC(=O)NCC1CN2C(=O)CC2O1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.