Synonyms: 4-Thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylicacid, 6-(1-hydroxyethyl)-7-oxo-3-[(tetrahydro-3-thienyl)thio]-, S-oxide,[5R-[3(1R*,3S*),5a,6a(R*)]]-; (S)-CP 70429;4-Thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid,6-(1-hydroxyethyl)-7-oxo-3-[(tetrahydro-1-oxido-3-thienyl)thio]-,[5R-[3(1R*,3S*),5a,6a(R*)]]-; CP 70429; Sulopenem