[1,2-a]

[1,2-b]

[1,2-c]

[1,2-d]

[1,2-f]

[1,2-x]

[1,5-a]

[1,5-b]

[1,5-c]

[1,5-d]

[1,6-ad][1,7-a]

[2,1-a]

[2,1-b]

[2,1-c]

[2,1-d]

[2,1-e]

[2,1-f]

[2,1-]

[2,3-a]

[2,3-b]

[2,3-c]

[2,3-d]

[2,3-e]

[2,3-f]

[2,3-g]

[2,3-h]

[2,3-ij][2,4-b]

[3,2-a]

[3,2-b]

[3,2-c]

[3,2-d]

[3,2-e]

[3,2-g]

[3,2-f]

[3,2-h]

[3,4-a]

[3,4-b]

[3,4-c]

[3,4-d]

[3,4-e]

[3,4-f]

[3,4-g]

[3,4-]

[4,3-a]

[4,3-b]

[4,3-c]

[4,3-d]

[4,3-e]

[4,3-g]

[4,3-]

[4,5-a]

[4,5-b]

[4,5-c]

[4,5-d]

[4,5-e]

[4,5-f]

[4,5-g]

[4,5-h]

[4,5-]

[5,1-a]

[5,1-b]

[5,1-c]

[5,1-f]

[5,1-]

[5,4-b]

[5,4-c]

[5,4-d]

[5,4-e]

[5,4-f]

[5,4-]

[5,6-b]

[5,6-c]

[5,6-]

[6,1-b]

[6,1-]

[6,5-b]

[6,5-]

Order 92-54-6 1-Phenyl-piperazine

Order 11475-31-5 1-Benzylpiperazine HCl

Order 61903-11-5 N-Acetylhomopiperazine

Order 13889-98-0 N-Acetyl piperazine

Order 14508-49-5 2-Chloro-pyrazine

Order 4949-13-7 2-fluoropyrazine

Order 56423-63-3 2-Bromopyrazine

Order 4858-85-9 2,3-Dichloropyrazine

Order 98-97-5 2-Pyrazinecarboxylic acid

Order 5469-69-2 3-Amino-6-chloropyridazine

Order 17973-86-3 3,6-Dibromopyridazine

Order 930-36-9 N-Methylpyrazole

Order 109-99-9 Tetrahydrofuran

Order 618-30-4 5-Chlorofuran-2-carboxylic acid

Order 29515-99-9 5-Methylthio-1H-tetrazole

Order 6818-99-1 3-Chloro-1,2,4-triazole