(2S,3R,5R)-benzhydryl 3-(chloromethyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate

(2S,3S,5R)-benzhydryl 3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4-oxide

(2S,3S,5R)-3-formyl-7-oxo-3-(1H-1,2,3-triazole-1-carbonyl)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4,4-dioxide

(2S,3S,5R)-3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4,4-dioxide

(2S,3S,5R)-ethyl 3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4,4-dioxide

(2S,3S,5R)-3-((1H-1,2,3-triazol-1-yl)methyl)-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2,3-dicarboxylic acid 4,4-dioxide

(2S,2'S,3S,3'S,5R,5'R)-3,3'-((3aS,3bS,6aR,6bS)-cyclobuta[1,2-d:3,4-d']bis([1,2,3]triazole)-1,6(3aH,3bH,6aH,6bH)-diylbis(methylene))bis(3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4,4-dioxide)