(2S,4S)-ethyl 1-methoxybicyclo<2.2.2>oct-5-ene-2-endo-carboxylate
(2S,4S)-(-)-1-methoxybicyclo<2.2.2>oct-5-ene-2-endo-carboxylic acid
(+/-)exo-1-methoxybicyclo[2.2.2]oct-5-ene-2-carboxylic acid
(2S,4S)-ethyl 1-hydroxybicyclo<2.2.2>oct-5-ene-2-endo-carboxylate