496793-41-0 4-Isoxazolidinol,2-[[6-[(3,5-dimethyl-1H-pyrazol-4-yl)methyl]-3-ethyl-1,2,3,4-tetrahydro-1-(1-methylethyl)-2,4-dioxothieno[2,3-d]pyrimidin-5-yl]carbonyl]-, (4S)-