1,2,3,4-tetrahydropyrido[2,3-b]pyrazine 1-(pyrazin-2-yl)ethan-1-one 1H-pyrazolo[3,4-b]pyrazine 2,3-diphenylpyrazine 2,5-dibromopyrazine 2,5-dichloropyrazine 2,6-dibromopyrazine 2,6-dichloropyrazine 2-(piperazin-1-yl)pyrazine 2-(trifluoromethyl)pyrazine 2-bromo-3-methoxypyrazine 2-bromo-3-methylpyrazine 2-bromo-5-chloropyrazine 2-bromo-6-chloropyrazine 2-bromo-6-methylpyrazine 2-bromopyrazine 2-chloro-3-methylpyrazine 2-chloro-6-methylpyrazine 2-chloropyrazine 2-ethoxypyrazine 2-ethylpyrazine 2-fluoropyrazine 2-iodopyrazine 2-methoxypyrazine 2-methylpyrazine 2-phenylpyrazine 3-chloropyrazin-2-amine 3-chloropyrazine-2-carbonitrile 4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine 4-(pyrazin-2-yl)morpholine 5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine 5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine 5,6,7,8-tetrahydroimidazo[1,5-a]pyrazine 5-bromopyrazin-2-amine 5-bromopyrazin-2-ol 5-chloropyrazin-2-amine 5H-pyrrolo[2,3-b]pyrazine 6-bromopyrazin-2-amine 6-chloropyrazin-2-amine [1,2,4]triazolo[1,5-a]pyrazine [1,2,4]triazolo[4,3-a]pyrazine ethyl pyrazine-2-carboxylate imidazo[1,5-a]pyrazine methyl 3-bromopyrazine-2-carboxylate methyl 6-bromopyrazine-2-carboxylate methyl 6-chloropyrazine-2-carboxylate methyl pyrazine-2-carboxylate pyrazin-2-amine pyrazin-2-ol pyrazin-2-ylmethanamine pyrazine-2-carbaldehyde pyrazine-2-carbohydrazide pyrazine-2-carbonitrile pyrazine-2-carboxamide pyrazine-2-carboxylic acid pyrazolo[1,5-a]pyrazine pyrido[2,3-b]pyrazine pyrido[3,4-b]pyrazine tert-butyl pyrazin-2-ylcarbamate

aminopyrazine bromopyrazine chloropyrazine cyanopyrazine dibromopyrazine dichloropyrazine dihydropyrazine dimethylpyrazine ethoxypyrazine ethylpyrazine fluoropyrazine hydrazinylpyrazine hydroxypyrazine imidazopyrazine iodopyrazine methoxypyrazine methylpyrazine octahydropyrazino oxazolopyrazin-one-hydrochloride phenylpyrazin piperazine-pyrazine pyrazin-amine pyrazin-ethylamine pyrazin-one pyrazine derivatives pyrazine-nitrile pyrazinecarboxylic pyrazino pyrazolopyrazine pyridopyrazine pyrrolopyrazine triazolopyrazine trifluoromethyl-phenyl-pyrazin trifluoromethyl-pyrazine trimethylpyrazine

Aromatic Heterocycles Guanidines Imidazoles Morpholines Other Aromatic Heterocycles Piperazines Piperidines Pyrazoles Pyrrolidines Tetrahydropyrans Thiophenes

Alcohols Aldehydes Aliphatic Chain Hydrocarbons Alkenyls Alkynyls Amides Amidines Amines Aryls Benzyl bromides Benzyl Chlorides Bromides Carboxylic Acids Chiral Building Blocks Chlorides Difluoromethyls Esters Ethers Fluorinated Building Blocks Hydrazides Hydrazines Iodides Ketones Nitriles Nitroes Organoboron Phenols Sulfamides Sulfides Thioureas Trifluoromethyls Ureas