6-Chloro-1,2,3,4-tetrahydropyrido[2,3-b]pyrazine
1,2,3,4-Tetrahydropyrido[2,3-b]pyrazine
7-Bromo-6-methyl-1,2,3,4-tetrahydropyrido[2,3-b]pyrazine
6-Methyl-1,2,3,4-tetrahydropyrido[2,3-b]pyrazine
1-Methyl-1,2,3,4-tetrahydropyrido[2,3-b]pyrazine
