Palbociclib571190-30-2100 % similar tert-Butyl 4-[6-(6-bromo-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydro-pyrido[2,3-D]pyrimidin-2-ylamino)-pyridin-3-yl]-piperazine-1-carboxylate571188-82-460 % similar 6-Bromo-2-chloro-8-cyclopentyl-5-methylpyrido[2,3-D]pyrimidin-7(8H)-one1016636-76-240 % similar Ribociclib1211441-98-339 % similar 1-(4-Acetylphenyl)piperazine51639-48-634 % similar 2-Chloro-8-cyclopentyl-5-methylpyrido[2,3-D]pyrimidin-7(8H)-one1013916-37-431 % similar