(2S,3R)-methyl 1-benzoyl-3-(2-(tert-butoxy)-2-oxoethyl)-4-hydroxy-4-(prop-1-en-2-yl)pyrrolidine-2-carboxylate

(3S,3aS)-3-Hydroxymethyl-6-methyl-2,3,3a,4-tetrahydro-1H-cyclopenta[c]pyrrol-5-one

(S)-3-(but-2-ynyl)-4-vinyloxazolidin-2-one

(3aS,3bS)-6-Methyl-3a,3b,4,7-tetrahydro-3H-2-oxa-7a-azacyclopenta(a)pentalene-1,5-dione

(3S,3aS)-3-(Hydroxymethyl)-6-methyl-2-(toluene-4-sulfonyl)-2,3,3a,4-tetrahydro-1H-cyclopenta(c)pyrrol-5-one