(2008/06/13)
4-(4-pyrido[2,3-d]pyrimidinyl)-1-piperazinecarboxylic acid tert-butyl ester
4-hydroxypyrido[2,3-d]pyrimidine
4-(5,6,7,8-tetrahydro-pyrido[2,3-d]pyrimidin-4-yl)-piperazine-1-carboxylic acid tert-butyl ester
4-chloro-pyrido[2,3-d]pyrimidine
2-aminopyridin-3-carboxylic acid