4-[6-[(6-Bromo-8-cyclopentyl-7,8-dihydro-5-methyl-7-oxopyrido[2,3-d]pyrimidin-2-yl)amino]-3-pyridinyl]-1-piperazinecarboxylic acid 1,1-dimethylethyl ester is a chemical compound used in pharmaceutical research. It belongs to the class of piperazinecarboxylic acids and is designed for potential therapeutic applications, particularly in the treatment of specific diseases or conditions where its molecular properties may be beneficial.