(S,R)-((pentane-1,5-diylbis(oxy))bis(5-methoxy-2-nitro-4,1-phenylene))bis(((2S,4R)-2-(((tert-butyldimethylsllyl)oxy)methyl)-4-hydroxypyrrolidin-1-yl) methanone)

(2S,4R)-N-(2-amino-4,5-dimethoxybenzoyl)-2-(tert-butyldimethylsilyloxymethyl)-4-hydroxypyrrolidine

{2-[(S)-4-Eth-(E)-ylidene-2-hydroxymethyl-pyrrolidine-1-carbonyl]-4,5-dimethoxy-phenyl}-carbamic acid allyl ester

(2-Amino-4-benzyloxy-5-methoxy-phenyl)-[(2S,4R)-2-(tert-butyl-dimethyl-silanyloxymethyl)-4-hydroxy-pyrrolidin-1-yl]-methanone

(2S)-N-[(2-allyloxycarbonylamino)-4,5-dimethoxybenzoyl]-2-(tert-butyldimethylsilyloxymethyl)-4-oxopyrrolidine