p. 1197 - 1201
(2008/09/19)p. 1561 - 1568
(2007/10/02)2-(5,6-dicyano-3-phenyl-pyrazin-2-ylamino)-butyric acid
N-(5,6-dicyano-3-phenyl-pyrazin-2-yl)-alanine
6-Phenyl-5-propylamino-2,3-pyrazinedicarbonitrile
5-(5,7-dioxo-2,3,5,7-tetrahydro-1,4-dithiino[2,3-c]pyrrol-6-yl)-6-phenylpyrazine-2,3-dicarbonitrile
5-(3,4-dimethyl-2,5-dioxo-2,5-dihydropyrrol-1-yl)-6-phenylpyrazine-2,3-dicarbonitrile