> product > Diversity Oriented Building Blocks > By Structure > Fused Heterocycles + > Pyrrolo[2,3-b]pyrazines
![7-iodo-5-(4-methylbenzenesulfonyl)-5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/12019_G_1528158642639.jpg)
7-iodo-5-(4-methylbenzenesulfonyl)-5H-pyrrolo[2,3-b]pyrazine
![methyl 5H-pyrrolo[2,3-b]pyrazine-2-carboxylate](images/201806/source_img/11260_G_1528158602114.jpg)
methyl 5H-pyrrolo[2,3-b]pyrazine-2-carboxylate
![7-bromo-5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/10619_G_1528158572634.jpg)
7-bromo-5H-pyrrolo[2,3-b]pyrazine
![2-bromo-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid](images/201806/source_img/7639_G_1528158016685.jpg)
2-bromo-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid
![2-Bromo-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde](images/201806/source_img/7638_G_1528158016077.jpg)
2-Bromo-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde
![(2-Bromo-5h-pyrrolo[2,3-b]pyrazin-7-yl)methanol](images/201806/source_img/7637_G_1528158016071.jpg)
(2-Bromo-5h-pyrrolo[2,3-b]pyrazin-7-yl)methanol
![2-bromo-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde](images/201806/source_img/7636_G_1528158016216.jpg)
2-bromo-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde
![5H-Pyrrolo[2,3-b]pyrazine-7-methanamine](images/201806/source_img/5658_G_1528157601489.jpg)
5H-Pyrrolo[2,3-b]pyrazine-7-methanamine
![5H-Pyrrolo[2,3-b]pyrazine-7-carboxaldehyde](images/201806/source_img/5657_G_1528157601038.jpg)
5H-Pyrrolo[2,3-b]pyrazine-7-carboxaldehyde
![5H-Pyrrolo[2,3-b]pyrazine-7-carboxylic acid](images/201806/source_img/5656_G_1528157601270.jpg)
5H-Pyrrolo[2,3-b]pyrazine-7-carboxylic acid
![2-chloro-7-iodo-5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/1198_G_1528157238533.jpg)
2-chloro-7-iodo-5H-pyrrolo[2,3-b]pyrazine
![3-bromo-5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/1192_G_1528157238568.jpg)
3-bromo-5H-pyrrolo[2,3-b]pyrazine
![2-chloro-5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/1190_G_1528157238863.jpg)
2-chloro-5H-pyrrolo[2,3-b]pyrazine
![2-bromo-7-nitro-5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/449_G_1528157210472.jpg)
2-bromo-7-nitro-5H-pyrrolo[2,3-b]pyrazine
![2-bromo-5H-pyrrolo[2,3-b]pyrazin-7-amine](images/201806/source_img/448_G_1528157210918.jpg)
2-bromo-5H-pyrrolo[2,3-b]pyrazin-7-amine
![7-nitro-5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/447_G_1528157210493.jpg)
7-nitro-5H-pyrrolo[2,3-b]pyrazine
![5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/445_G_1528157210990.jpg)
![2-bromo-7-iodo-5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/371_G_1528157207511.jpg)
2-bromo-7-iodo-5H-pyrrolo[2,3-b]pyrazine
![2-bromo-5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/370_G_1528157207111.jpg)
2-bromo-5H-pyrrolo[2,3-b]pyrazine
![5H-pyrrolo[2,3-b]pyrazine](images/201806/source_img/369_G_1528157207834.jpg)