英文别名Palbociclib Impurity Q; 4-[6-[[6-(2-Butoxyethenyl)-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; Palbociclib Impurity 35; Palbociclib Impurity 06; 1-Piperazinecarboxylic acid, 4-[6-[[6-(2-butoxyethenyl)-8-cyclopentyl-7,8-dihydro-5-methyl-7-oxopyrido[2,3-d]pyrimidin-2-yl]amino]-3-pyridinyl]-, 1,1-dimethylethyl ester; tert-butyl (E)-4-(6-((6-(2-butoxyvinyl)-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate; (E)-tert-butyl 4-(6-((6-(2-butoxyvinyl)-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate; Palbociclib Impurity 164; tert-Butyl 4-(6-((6-(2-butoxyvinyl)-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate 
