for the following products
Boc-trans-DL-beta-Pro-4-(phenyl)-OH | Rel-(3R,4S)-1-(tert-butoxycarbonyl)-4-phenylpyrrolidine-3-carboxylic acid | trans-N-(tert-Butoxycarbonyl)-4-phenylpyrrolidine-3-carboxylic acid and 1-[(2-Methylpropan-2-yl)oxy-oxomethyl]-3-phenyl-2,3-dihydropyrrole-4-carboxylic acid
