(1S,5R,6R)-5-(1-ethyl-propoxy)-7-oxa-bicyclo[4.1.0]hept-3-ene-3-carboxylic acid ethyl ester

ethyl (3R,4S,5R)-5-N-(1,1-dimethylethyl)amino-3-(1-ethylpropoxy)-4-hydroxy-1-cyclohexene-1-carboxylate

(3R,4S,5R)-4-[(diethoxyphosphoryl)amino]-3-(1-ethylpropoxy)-5-(methanesulfonyloxy)cyclohex-1-enecarboxylic acid ethyl ester

ethyl (3R,4S,5R)-5-N-allyllamino-3-(1-ethylpropoxy)-4-hydroxy-1-cyclohexene-1-carboxylate

ethyl (3R,4S,5R)-5-N-benzylideneamino-3-(1-ethylpropoxy)-4-hydroxy-1-cyclohexene-1-carboxylate