| | Identification | Back Directory |  | [Name] 
 4-[6-[(8-cyclopentyl-6-ethenyl-7,8-dihydro-5-methyl-7-oxopyrido[2,3-d]pyrimidin-2-yl)amino]-3-pyridinyl]-1-piperazinecarboxylic acid tert-butyl ester
 |  | [CAS] 
 1941177-45-2
 |  | [Synonyms] 
 Palbociclib-020
 Palbociclib Impurity 50
 4-[6-[(8-cyclopentyl-6-ethenyl-7,8-dihydro-5-methyl-7-oxopyrido[2,3-d]pyrimidin-2-yl)amino]-3-pyridinyl]-1-piperazinecarboxylic acid tert-butyl ester
 1-Piperazinecarboxylic acid, 4-[6-[(8-cyclopentyl-6-ethenyl-7,8-dihydro-5-methyl-7-oxopyrido[2,3-d]pyrimidin-2-yl)amino]-3-pyridinyl]-, 1,1-dimethylethyl ester
 4-?[6-?[(8-?Cyclopentyl-?6-?ethenyl-?7,?8-?dihydro-?5-?methyl-?7-?oxopyrido[2,?3-?d]?pyrimidin-?2-?yl)?amino]?-?3-?pyridinyl]?-1-?Piperazinecarboxylic Acid 1,?1-?Dimethylethyl Ester
 |  | [Molecular Formula] 
 C29H37N7O3
 |  | [MDL Number] 
 MFCD28359442
 |  | [MOL File] 
 1941177-45-2.mol
 |  | [Molecular Weight] 
 531.65
 | 
 | Chemical Properties | Back Directory |  | [Melting point ] 
 >220°C (dec.)
 |  | [storage temp. ] 
 Amber Vial, -20°C Freezer, Under inert atmosphere
 |  | [solubility ] 
 Dichloromethane (Slightly, Heated), DMSO (Slightly, Heated, Sonicated)
 |  | [form ] 
 Solid
 |  | [color ] 
 Light Yellow to Dark Beige
 |  | [Stability:] 
 Light Sensitive
 | 
 | Hazard Information | Back Directory |  | [Uses] 
 4-?[6-?[(8-?Cyclopentyl-?6-?ethenyl-?7,?8-?dihydro-?5-?methyl-?7-?oxopyrido[2,?3-?d]?pyrimidin-?2-?yl)?amino]?-?3-?pyridinyl]?-1-?Piperazinecarboxylic Acid 1,?1-?Dimethylethyl Ester is an impurity of Palbociclib (P139900) an experimental drug for the treatment of breast cancer being developed by Pfizer. It is a selective inhibitor of the cyclin-dependent kinases CDK4 and CDK6.
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