(3S,4R,5R)-3,4-Bis-benzyloxy-5-methyl-pyrrolidin-2-one

(2R,3R,4R,5R)-2-(4-methoxyphenyl)-1,5-dimethylpyrrolidine-3,4-diol

tert-butyl 3,4-dihydroxy-2-(4-methoxyphenyl)-5-methyl-(2R,3R,4R,5R)-tetrahydro-1H-1-pyrrolecarboxylate

(2R,3R,4S)-3,4-Bis-benzyloxy-2-methyl-5-oxo-pyrrolidine-1-carboxylic acid tert-butyl ester

(2R,3R,4R,5R)-3,4-Bis-benzyloxy-2-(4-methoxy-phenyl)-5-methyl-pyrrolidine-1-carboxylic acid tert-butyl ester