(2S,3R,4R,5S)-2,5-dihydroxy-1,3,4-tris(benzyloxy)-6-heptene

(2S,5S)-N-(methoxycarbonyl)-5-(hydroxymethyl)-2-(p-methoxyphenyl)-3-pyrroline

(5S)-N-(methoxycarbonyl)-5-(trityloxymethyl)-2-pyrroline

(2R,3R,4R,5R)-3,4-Dihydroxy-2-hydroxymethyl-5-(4-methoxy-phenyl)-pyrrolidine-1-carboxylic acid methyl ester

(2R,3R,4R,5R)-2-(acetoxymethyl)-1-(methoxycarbonyl)-5-(4-methoxyphenyl)pyrrolidine-3,4-diyl diacetate