Palbociclib Impurity 41

Chemical Name: 8-cyclopentyl-6-hydroxy-5-methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)amino)pyrido[2,3-d]pyrimidin-7(8H)-one

Synonym: Bis[(3S)-tetrahydro-3-furanyl](3S,4R,10R,11S)-4,10- bis({[(4-aminophenyl)sulfonyl](2-methylpropyl)amino}methyl)-6,8-dihydroxy-3,11-bis(phenylmethyl)-5,7,9-triroxo-2,12-diaza-6,8-diphosphatridecanedioate-6,8-oxide

Smile: CC1=C(O)C(N(C2CCCC2)C3=NC(NC4=NC=C(N5CCNCC5)C=C4)=NC=C31)=O