21457-29-4 5H-Thiazolo(3,2-a)pyrimidin-7-ol, 6,7-dihydro-3-ethyl-2,5,5,7-tetramethyl-, monohydrobromide 6,7-Dihydro-3-ethyl-2,5,5,7-tetramethyl-5H-thiazolo(3,2-a)pyrimidin-7-ol hydrobromide