(3R,5S)-5-[{{(1S)-2-hydroxy-7,7-dimethylbicyclo[2.2.1]heptan-1-yl}methylthio}methyl]pyrrolidin-3-ol

tert-butyl (2S,4R)-2-[({[(1S,4R)-7,7-dimethyl-2-oxobicyclo[2.2.1]heptan-1-yl]methyl}thio)methyl]-4-hydroxypyrrolidine-1-carboxylate

tert-butyl (2S,4R)-4-hydroxy-2-({[(4-methylphenyl)sulfonyl]oxy}methyl)-pyrrolidine-1-carboxylate