6-phenyl-3H-[1,2,4]triazolo[1,5-b][1,2,4]triazin-7-one

1-methyl-6-phenyl-[1,2,4]triazolo[1,5-b][1,2,4]triazin-7-one

2-methyl-6-phenyl-3H-[1,2,4]triazolo[1,5-b][1,2,4]triazin-7-one

2-phenyl-5H-[1,2,4]triazino[3,2-b]quinazoline-3,10-dione

3-hydrazinyl-6-phenyl-2H-1,2,4-triazin-5-one