Synonyms: 4-Thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylicacid, 6-(1-hydroxyethyl)-7-oxo-3-(tetrahydro-2-furanyl)-, [5R-[3(R*),5a,6a(R*)]]-;(+)-(5R,6S)-6-[(1R)-1-Hydroxyethyl]-7-oxo-3-[(2R)-tetrahydro-2-furyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylicacid;(5R,6S,8R,2'R)-2-(2'-tetrahydrofuryl)-6-(1-hydroxyethyl)-2-penem-3-carboxylicacid;