(1R,2R,5R)-2-iodo-7-oxabicyclo[3.2.1]octan-6-one

(1R,5S)-ethyl 5-(N-(tert-butoxycarbonyl)-4-nitrophenylsulfonamido)cyclohex-3-enecarboxylate

(1R,3S,5S,6S)-ethyl 5-(tert-butoxycarbonylamino)-7-oxabicyclo[4.1.0]heptane-3-carboxylate

N-(4-chloro-7-oxo-6-oxabicyclo[3.2.1]octan-3-yl)acetamide

3-Cyclohexene-1-carboxylic acid (S)-pantolactone ester