2-[[(3aR,4S,6R,6aS)-6-[[4-[N-[(1R,2S)-2-(3,4-difluorophenyl)cyclopropan-1-yl]-N-tert-butoxycarbonyl]amino]-2-(propylthio)-5-nitropyrimidin-6-yl]-2,2-dimethyl-tetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl]oxy] ethanol