Cyclization of azinium cations with bifunctional nucleophiles. 27. Actoacetamides in synthesis of derivatives of a new heterocyclic system of pyrrolo[3,2-E]-1,2,4-triazine / S. G. Alekseev, V. N. Charushin, O. N. Chupakhin, G. G. Aleksandrov, S. V. Shorshnev, A. I. Chernyshev // Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. - 1989. - Vol. 38, № 7. - P. 1501-1507.