Vejdelek, Z: Reactions of 4-chloro-1-nitrobenzene with (3-chloro-4-methoxyphenyl) acetonitrile and (3,4-dimethoxyphenyl) acetonitrile; synthesis of 8-chloro-1-methyl (and methylthiomethyl)-6-(3,4-disubstituted phenyl)-4h-s-triazolo/4|,3-a/-benzodiazepines