Synonyms: 4-Thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylicacid,6-[(1R)-1-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-[(2R)-tetrahydro-2-furanyl]-,2-propenyl ester, (5R,6S)- (9CI);4-Thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid,6-[1-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-(tetrahydro-2-furanyl)-,2-propenyl ester, [5R-[3(R*),5a,6a(R*)]]-;