Potassium; 7-oxo-3-(3-thiocyanato-propyl)-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylate

3-(3-Cyano-propyl)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-trimethylsilanyl-ethyl ester

7-Oxo-3-(3-thiocyanato-propyl)-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-trimethylsilanyl-ethyl ester

[2-(4-Cyano-butyrylsulfanyl)-4-oxo-azetidin-1-yl]-(triphenyl-λ5-phosphanylidene)-acetic acid 2-trimethylsilanyl-ethyl ester

Potassium; 3-(3-cyano-propyl)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylate