methyl (S,E)-3-(2-(1,3-dioxoisoindolin-2-yl)-3-methoxy-3-oxoprop-1-en-1-yl)-5,5-dimethylthiazolidine-4-carboxylate

methyl (S)-2-((2S,3R)-2-chloro-3-(1,3-dioxoisoindolin-2-yl)-4-oxoazetidin-1-yl)-3-(chlorothio)-3-methylbutanoate

2-[(2S,3R)-2-Chloro-3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-4-oxo-azetidin-1-yl]-3-methyl-but-2-enoic acid methyl ester