(1S,2R,3S,4R)-3-Hydroxymethyl-bicyclo[2.2.1]hept-5-ene-2-carboxylic acid

(2,R)-endo-methoxycarbonyl-(3,S)-endo-hydroxymethylbicyclo<2.2.1>heptene-5

(1S,2S,3S,6R,7R,9R)-2-Hydroxy-4-oxa-tricyclo[4.2.1.03,7]nonane-9-carboxylic acid methyl ester