(2S,3R,4S)-2-(2,2-Dimethyl-propionyloxymethyl)-3-hydroxy-4-isopropenyl-1-(4-methoxy-benzyl)-4-methyl-5-oxo-pyrrolidine-2-carboxylic acid methyl ester
(4-methoxybenzylamino)acetic acid methyl ester
t-butyldimethylsiyl triflate
(2S,3R,4R)-4-Acetyl-3-hydroxy-2-((R)-1-hydroxy-2-methyl-propyl)-1-(4-methoxy-benzyl)-4-methyl-5-oxo-pyrrolidine-2-carboxylic acid methyl ester
(1S,4R,5R)-1-((R)-1-Hydroxy-2-methyl-propyl)-2-(4-methoxy-benzyl)-4-methyl-6-oxa-2-aza-bicyclo[3.2.0]heptane-3,7-dione
(1S,4R,5R)-1-((S)-1-Hydroxy-2-methyl-propyl)-4-methyl-6-oxa-2-aza-bicyclo[3.2.0]heptane-3,7-dione
(1S,4R,5R)-1-((R)-1-Hydroxy-2-methyl-propyl)-4-methyl-6-oxa-2-aza-bicyclo[3.2.0]heptane-3,7-dione
(2R,3R,4R)-4-Acetyl-3-(tert-butyl-dimethyl-silanyloxy)-2-formyl-1-(4-methoxy-benzyl)-4-methyl-5-oxo-pyrrolidine-2-carboxylic acid methyl ester