Hz (8 i65. 4 ppm) and the vicinal 3JczH6 10.7 Hz (6C 2 165.2 ppm) and 3Jc4H6 i0 Hz (6C~ 166.2 ppm)(data at'80~ as well as the comparison of these data with literature data for striazine [6] give evidence in favor of the presence of a triazine ring. Characteristic of the laC NMR spectrum of compound IVa (recorded at room temperature) is the presence of pronounced broadening of the signals of the C 4 and C~ atoms of the triazine ring, the ...