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Products Chemical Name: 4-(6-Aminopyridin-3-yl)piperazine-1-carboxylic acid tert-butyl ester  Cas No.: 571188-59-5  Molecular Formula: C14H22N4O2  Molecular Weight: 278.354  Specification: 98%  Appearance: White or off white powder  Usage: Palbociclib intermediate