Using CN1C[C@H](CN=[N+]=[N-])C=C2c3cccc4c3c(cn4C)C[C@H]21 to produce CN1C[C@H](CN)C=C2c3cccc4c3c(cn4C)C[C@H]21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.