Chemical properties and molecular structure of derivatives of sym-heptazine [1,3,4,6,7,9,9b-heptaazaphenalene, tri-1,3,5-triazine]
Abram Iosifovich Finkel'shtein, Natal'ya Vladimirovna Spiridonova
Volume 33, Issue 7, 400-405
Communication , 30 November 1963