> product > Diversity Oriented Building Blocks > By Structure > Fused Heterocycles + > Pyrrolo[2,1-f][1,2,4]triazines
![5-bromo-3H,4H-pyrrolo[2,1-f][1,2,4]triazin-4-one](images/201806/source_img/11901_G_1528158635476.jpg)
5-bromo-3H,4H-pyrrolo[2,1-f][1,2,4]triazin-4-one
![7-bromopyrrolo[2,1-f][1,2,4]triazin-4-amine](images/201806/source_img/11878_G_1528158634780.jpg)
7-bromopyrrolo[2,1-f][1,2,4]triazin-4-amine
![pyrrolo[2,1-f][1,2,4]triazin-4-amine](images/201806/source_img/11877_G_1528158634196.jpg)
pyrrolo[2,1-f][1,2,4]triazin-4-amine
![ethyl 4-chloropyrrolo[2,1-f][1,2,4]triazine-6-carboxylate](images/201806/source_img/11854_G_1528158633953.jpg)
ethyl 4-chloropyrrolo[2,1-f][1,2,4]triazine-6-carboxylate
![2-(methylsulfanyl)-3h,4h-pyrrolo[2,1-f][1,2,4]triazin-4-one](images/201806/source_img/11386_G_1528158608383.jpg)
2-(methylsulfanyl)-3h,4h-pyrrolo[2,1-f][1,2,4]triazin-4-one
![6-bromopyrrolo[2,1-f][1,2,4]triazin-4-amine](images/201806/source_img/11365_G_1528158607038.jpg)
6-bromopyrrolo[2,1-f][1,2,4]triazin-4-amine
![ethyl 4-oxo-3H,4H-pyrrolo[2,1-f][1,2,4]triazine-6-carboxylate](images/201806/source_img/11345_G_1528158606639.jpg)
ethyl 4-oxo-3H,4H-pyrrolo[2,1-f][1,2,4]triazine-6-carboxylate
![ethyl 5-methyl-4-phenoxypyrrolo[2,1-f][1,2,4]triazine-6-carboxylate](images/201806/source_img/11344_G_1528158606055.jpg)
ethyl 5-methyl-4-phenoxypyrrolo[2,1-f][1,2,4]triazine-6-carboxylate
![5-methyl-4-(methylsulfanyl)pyrrolo[2,1-f][1,2,4]triazine](images/201806/source_img/11004_G_1528158590803.jpg)
5-methyl-4-(methylsulfanyl)pyrrolo[2,1-f][1,2,4]triazine
![7-bromo-4-chloropyrrolo[2,1-f][1,2,4]triazine](images/201806/source_img/10920_G_1528158586658.jpg)
7-bromo-4-chloropyrrolo[2,1-f][1,2,4]triazine
![7-bromo-3H,4H-pyrrolo[2,1-f][1,2,4]triazin-4-one](images/201806/source_img/10335_G_1528158560495.jpg)
7-bromo-3H,4H-pyrrolo[2,1-f][1,2,4]triazin-4-one
![6-bromo-3H,4H-pyrrolo[2,1-f][1,2,4]triazin-4-one](images/201806/source_img/10096_G_1528158550616.jpg)
6-bromo-3H,4H-pyrrolo[2,1-f][1,2,4]triazin-4-one
![4-chloropyrrolo[2,1-f][1,2,4]triazine-5-carbaldehyde](images/201806/source_img/7803_G_1528158024467.jpg)
4-chloropyrrolo[2,1-f][1,2,4]triazine-5-carbaldehyde
![5-(Bromomethyl)-4-chloropyrrolo[2,1-f][1,2,4]triazine](images/201806/source_img/7802_G_1528158024537.jpg)
5-(Bromomethyl)-4-chloropyrrolo[2,1-f][1,2,4]triazine
![4-chloropyrrolo[2,1-f][1,2,4]triazine](images/201806/source_img/588_G_1528157215287.jpg)
4-chloropyrrolo[2,1-f][1,2,4]triazine
![2-aminopyrrolo[2,1-f][1,2,4]triazin-4(3H)-one](images/201806/source_img/569_G_1528157214673.jpg)
2-aminopyrrolo[2,1-f][1,2,4]triazin-4(3H)-one
![pyrrolo[2,1-f][1,2,4]triazine-2,4(1H,3H)-dione](images/201806/source_img/568_G_1528157214398.jpg)
pyrrolo[2,1-f][1,2,4]triazine-2,4(1H,3H)-dione
![pyrrolo[2,1-f][1,2,4]triazin-4(3H)-one](images/201806/source_img/566_G_1528157214355.jpg)
pyrrolo[2,1-f][1,2,4]triazin-4(3H)-one
![ethyl 4-hydroxy-5-methylpyrrolo[2,1-f][1,2,4]triazine-6-carboxylate](images/201806/source_img/190_G_1528157200530.jpg)
ethyl 4-hydroxy-5-methylpyrrolo[2,1-f][1,2,4]triazine-6-carboxylate
![5-methylpyrrolo[2,1-f][1,2,4]triazin-4(1H)-one](images/201806/source_img/189_G_1528157200786.jpg)
5-methylpyrrolo[2,1-f][1,2,4]triazin-4(1H)-one