1,3-O-benzylidene-2-C-methyl-D-erythritol 4-(t-butyldimethylsilyl) ether

1,1-dibenzyl-2-((S)-1-((2S,4R,5R)-5-hydroxy-2-phenyl-1,3-dioxan-4-yl)allyl)hydrazine

1,1-dibenzyl-2-((2S,4aR,8S,8aR)-7-methylene-2-phenyl-hexahydropyrano[3,2-d][1,3]dioxin-8-yl)hydrazine

1,1-dibenzyl-2-(((2S,4R,5R)-5-(dimethyl(vinyl)silyloxy)-2-phenyl-1,3-dioxan-4-yl)methylene)hydrazine

1,3-benzylidene-D-erythritol