(R,E)-2-(3-ethoxy-3-oxoprop-1-enyloxy)hexanoic acid

(R,E)-ethyl 3-(1-(tert-butyldimethylsiloxy)hexan-2-yloxy)acrylate

(R,E)-ethyl 3-(1-diazo-2-oxoheptan-3-yloxy)acrylate

(1S,3R,5S,6S)-ethyl 3-butyl-4-oxo-2-oxabicyclo[3.1.0]hexane-6-carboxylate

(1S,3R,4S,5R,6S)-ethyl 3-butyl-4-hydroxy-2-oxabicyclo[3.1.0]hexane-6-carboxylate