for the following products
Cyclopenta[c]pyrrole-1-carboxylic acid, 2-[(2S)-2-amino-3,3-dimethyl-1-oxobutyl]octahydro-, 1,1-dimethylethyl ester, (1S,3aR,6aS)- and (1S,3aR,6aS)-2-[(2S)-2-amino-3,3-dimethyl-1-oxobutyl]octahydrocyclopenta[c]pyrrole-1-carboxylic acid tert-butyl ester
