5),Pyrazolo[1,5-a]pyrimidin-2-ol, 7-amino- (7CI),Pyrazolo[1,5-a]pyrimidin-5-amine, 6,7-dihydro-2-methyl-,Pyrazolo[4,3-c]pyrazole, 1,4-dihydro-3-nitro-,1-Pyrazolidinecarboxylic acid, 3,5-dioxo-, ethyl ester,1,3-Pyrazoledicarboxylic acid, 4,5-dimethyl- (3CI),2-Pyrazinecarbonitrile, 3-amino-5-propyl-,Pyrazino[2,1-c][1,4]oxazin-4(3H)-one, hexahydro-,Pyrazolidine, 1-benzoyl- (9CI),Pyrazinol, 3,6-dimethyl-, 1,4-dioxide (9CI),2-Pyrazolin-5-one, 4-allyl-4-hydroxy-3-methyl- (5CI),Pyrazolo[1,5-a]-1,3,5-triazin-4(1H)-one, 7-methyl- (9CI),4-Pyrazolidinone, 3,3,5,5-tetramethyl-, hydrazone,2-(pyrazin-2-ylcarbonyl)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid,1-[3-(pyrazin-2-yloxy)phenyl]methanamine,1-[4-(pyrazin-2-yloxy)phenyl]methanamine,2-(pyrazin-2-ylamino)acetamide,2-pyrazin-2-yl-1H-benzimidazol-5-amine,2-[4-(pyrazin-2-yloxy)phenyl]ethanamine,3-(pyrazin-2-ylamino)propanoic acid,1-pyrazin-2-ylpiperidin-4-amine,Pyrazine, trimethyl(3-pentenyl)-, (E)- (9CI),Pyrazinecarbonitrile, 5,6-dimethyl-3-(2-propenyl)- (9CI),Pyrazolo[3,4-b]azepine, 1-ethyl-1,4,5,6,7,8-hexahydro-3-propyl- (9CI),Pyrazinecarboxamide, N-[(6-chloro-1,3-dioxolo[4,5-g]quinolin-7-yl)methyl]-N-cyclopentyl- (9CI),Pyrazinemethanamine, 3-amino-5,6-dimethyl- (9CI),Pyrazolo[1,5-a]pyrimidin-7-ol, 2-(3,5-dimethoxyphenyl)-6-ethyl-5-methyl- (9CI),Pyrazolo[1,5-a]pyrimidin-7-ol, 2-(3,4-dimethoxyphenyl)-6-ethyl-5-methyl- (9CI),Pyrazinecarboxamide, N-[(2-chloro-7-methyl-3-quinolinyl)methyl]-N-(phenylmethyl)- (9CI),Pyrazinecarbonitrile, 3-amino-5-methoxy- (9CI),Pyrazole-5-carbonitrile, 1-acetyl-4-methyl- (7CI,8CI),4-[4-(PYRAZIN-2-YL)-1H-PYRAZOL-1-YL]-N-(3-(TRIFLUOROMETHYL)BENZYL)BENZAMIDE,Pyrazinecarboxamide, N-cyclopentyl-N-[(9-methyltetrazolo[1,5-a]quinolin-4-yl)methyl]- (9CI),5-(PYRAZINE-2-YL)-3-(TRIFLUOROMETHYL)PYRAZOLE,Pyrazinecarboxamide, 1-oxide (8CI,9CI),Pyrazine, 3,6-diethoxy-2,5-dihydro-2-methyl- (9CI),Pyrazolo[3,4-b]azepine, 3-(1-ethyl-4-piperidinyl)-1,4,5,6,7,8-hexahydro- (9CI),5(4)-Pyrazolone, 3-(ethoxymethyl)-4-methyl- (1CI),2-Pyrazoline-5-carboxylic acid, 3-methyl-, ethyl ester (7CI),PYRAZOLO[1,5-A]PYRIDIN-7-YL-METHANOL,Pyrazine, 2,3-dimethyl-5-(2-methylbutyl)- (9CI),Pyrazino[2,3-b]pyrazine, decahydro-1,4a,8a-trimethyl-, (4aR,8aS)-rel- (9CI),Pyrazolo[3,4-d]-1,2,3-triazol-6-amine, 1,2,4,5-tetrahydro-4-methyl-2-phenyl- (9CI),1-pyrazin-2-yloctahydro-1H-indole-2-carboxylic acid,Pyrazinecarboxamide, 5-methyl-N-8-quinolinyl- (9CI)," />