5-((4R,5R)-2,2-dimethyl-5-((S)-3-methyl-6,7-dihydro-4H-[1,2,3]triazolo[5,1-c][1,4]oxazin-7-yl)-1,3-dioxolan-4-yl)-N,N-dimethylpyrimidin-2-amine

(1R,2R)-1-(2-(dimethylamino)pyrimidin-5-yl)-2-((S)-3-methyl-6,7-dihydro-4H-[1,2,3]triazolo[5,1-c][1,4]oxazin-7-yl)ethane-1,2-diyl diacetate

(4R,5R)-4-(2-(dimethylamino)pyrimidin-5-yl)-5-((S)-3-methyl-6,7-dihydro-4H-[1,2,3]triazolo[5,1-c][1,4]oxazin-7-yl)-1,3-dioxolan-2-one

(1R,2S)-2-azido-2-(2-(dimethylamino)pyrimidin-5-yl)-1-((S)-3-methyl-6,7-dihydro-4H-[1,2,3]triazolo[5,1-c][1,4]oxazin-7-yl)ethan-1-ol

(2R,3S,4R)-4-(2-(4-chlorophenyl)pyrimidin-5-yl)-3,4-bis((4-methoxybenzyl)oxy)-1-(trityloxy)butan-2-ol