4-Isoxazolidinol,2-[[1,2,3,4-tetrahydro-3-methyl-1-(2-methylpropyl)-2,4-dioxo-6-[(2-oxo-3(2H)-benzothiazolyl)methyl]thieno[2,3-d]pyrimidin-5-yl]carbonyl]-, (4S)- [ 496791-83-4 ]