5-phenoxy-6-(thiophen-2-yl)pyrazine-2,3-dicarbonitrile
5-(2-isopropyloxyphenoxy)-6-(thiophen-2-yl)pyrazine-2,3-dicarbonitrile
5-(2-tert-butylphenoxy)-6-(thiophen-2-yl)pyrazine-2,3-dicarbonitrile
5-(2-isopropylphenoxy)-6-(thiophen-2-yl)pyrazine-2,3-dicarbonitrile