The present invention is directed to novel protein kinase inhibitors comprising the chemical compound N-(2-chloro-6-methylphenyl)-2-[[2-methyl-6-(3-hydroxypyrrolidin-1-yl)pyrimidin-4-yl]amino]thiazole-5-carboxamide, its pharmaceutically acceptable salts, enantiomers, and enantiomeric mixtures, and methods of use to treat protein kinase-mediated diseases or conditions.