Pyrazine derivatives R 0550Condensation of Quinoxaline-2,3-dithione with Benzoylhydrazide in DMF. -The main product (III) (space group P21/c; Z=4) is accompanied by minor amounts of aminated derivatives (IV) and (V). -(MUSTAPHI, N. E. H.; FERFRA, S.; ESSASSI*, E. M.; GARRIGUES, B.; PIERROT, M.; Phosphorus, Sulfur Silicon Relat. Elem. 179 (2004) 11, 2265-2271; Lab. Chim. Org. Heterocycl., Fac. Sci., Univ.Mohammed V-Agdal, Rabat, Morocco; Fr., Abstr. Eng.) -A. Forchert 13-173