4-substituted phenyl crotyl ether derivative
4-Substituted-1-(3-[2-aminoanilino]-1-pyrazole-4-carbonyl)pipera
4-substituted-2(or 3)aminocarbonyl-1-piperazineacetamide
4-substituted-6-aryl-pyrimidine compounds
4-Substituted-piperidino carboxamides
4-thieno[2,3-D]pyrimidin-4-YL piperazine compounds
4-[4-(Thiazolyl-amino)benzyl]-2,3-dioxopiperazine derivatives, a