ethyl (4R)-4-((2S,3R)-3-((tert-butyldimethylsilyloxy)methyl)oxiran-2-yl)-4-(methoxymethoxy)-2-methylenebutanoate

ethyl (4R)-4-((2S,3R)-3-(hydroxymethyl)oxiran-2-yl)-4-(methoxymethoxy)-2-methylenebutanoate

(3R,4S,5R)-ethyl 5-acetylamino-4-hydroxy-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate

(3R,4S,5R)-ethyl 5-acetylamino-4-methanesulfonyloxy-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate

ethyl (3R,4R,5R)-4,5-acetylimino-3-(1-ethylpropoxy)cyclohex-1-ene-1-carboxylate