TGX-221. A potent inhibitor of PI 3-kinase beta, Synonyms: 7-Methyl-2-(morpholin-4-yl)-9-(1-phenylaminoethyl)-pyrido[1,2-a]-pyrimidin-4-one, Purity: G98% by High-performance liquid chromatography, CAS Number: 663619-89-4, Molecular Formula: C21H2GNGO2, 5mg.