280559-32-2
1-[(1S,2S)-1-((S)-2-tert-Butoxycarbonyl-pyrrolidine-1-carbonyl)-2-methyl-butyl]-2-hydroxy-5-oxo-2,5-dihydro-1H-pyrrole-2-carboxylic acid ethyl ester
280559-37-7
(S)-1-[(1S,2S)-1-((S)-2-tert-Butoxycarbonyl-pyrrolidine-1-carbonyl)-2-methyl-butyl]-2-methoxymethoxy-5-oxo-2,5-dihydro-1H-pyrrole-2-carboxylic acid ethyl ester
280559-34-4
(R)-1-[(1S,2S)-1-((S)-2-tert-Butoxycarbonyl-pyrrolidine-1-carbonyl)-2-methyl-butyl]-2-methoxymethoxy-5-oxo-2,5-dihydro-1H-pyrrole-2-carboxylic acid ethyl ester
280559-41-3
1-[(1S,2S)-1-((S)-2-Carboxy-pyrrolidine-1-carbonyl)-2-methyl-butyl]-2-hydroxy-5-oxo-2,5-dihydro-1H-pyrrole-2-carboxylic acid ethyl ester