1-<4-(tert-butoxycarbonyl)phenyl>-4-hydroxypiperidine

4-[5-(2,2-Dicyano-vinyl)-4-pyrrolidin-1-yl-3,6-dihydro-2H-pyridin-1-yl]-benzoic acid tert-butyl ester

1-<4-(tert-butoxycarbonyl)phenyl>-4-(N-pyrrolidino)-1,2,5,6-tetrahydropyridine

2-amino-3-cyano-6-<4-(tert-butoxycarbonyl)phenyl>-5,6,7,8-tetrahydropyrido<4,3-b>pyridine

2-amino-3-cyano-6-(4-carboxyphenyl)-5,6,7,8-tetrahydropyrido<4,3-b>pyridine