(3R,4R,5S)-ethyl 5-(1,3-dioxoisoindolin-2-yl)-3-(pentan-3-yloxy)-4-(2-(trimethylsilyl)ethylsulfonamido)cyclohex-1-enecarboxylate

(3R,4R,5S)-ethyl 5-(1,3-dioxoisoindolin-2-yl)-3-(pentan-3-yloxy)-4-(N-(2-(trimethylsilyl)ethylsulfonyl)acetamido)cyclohex-1-enecarboxylate

(2R,3S)-tert-butyl 2-(nitromethyl)-4-oxo-3-(pentan-3-yloxy)butanoate

(3R,4R,5S)-ethyl 4-amino-5-(tert-butoxycarbonylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate

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