(2S)-[(1'R)-phenylmethoxy-4'-[(4-methoxyphenyl)methoxy]butyl]-N-tert-butyloxycarbonyl-2,5-dihydropyrrole

2R-(1'R-phenylmethoxy-4'-hydroxy)butyl-3R,4S-diphenylmethoxypyrrolidine

2R-(1'R-phenylmethoxy-4'-[(4-methoxyphenyl)methoxy]butyl)-N-tert-butyloxycarbonyl-3R,4S-diphenylmethoxypyrrolidine

(2R,3S,4S)-2-[(1R)-1-[[(1,1-dimethylethyl)(diphenyl)silyl]oxy]-4-[(4-methoxyphenyl)methoxy]butyl]-3,4-bis(phenylmethoxy)pyrrolidine