Using [N-]=[N+]=NC1CCc2c(-c3cnc4ccccc4c3)c3c(N)ncnc3n2C1 to produce Nc1ncnc2c1c(-c1cnc3ccccc3c1)c1n2CC(N)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.