p. 5203 - 5207
(2015/11/09)p. 1689 - 1692
(2007/10/02)3-methoxypyrazinecarbonitrile
2-amino-3-pyrazinonitrile
ethyl 7-aminothieno[2,3-b]-pyrazine-6-carboxylate
ethyl 2-[(4-chlorophenylamino)-morpholin-1-yl-methyleneamino]thieno[2,3-b]pyrazine-6-carboxylate
ethyl 2-[N',N'-diethyl-N''-(4-nitrophenyl)guanidino]thieno[2,3-b]pyrazine-6-carboxylate