Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid,6-methoxy-3,3-dimethyl-6-[[(2R)-3-(2-methylphenoxy)-1,3-dioxo-2-(3-thienyl)propyl]amino]-7-oxo-,monosodium salt, (2S,5R,6S)- (9CI); 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid,6-methoxy-3,3-dimethyl-6-[[3-(2-methylphenoxy)-1,3-dioxo-2-(3-thienyl)propyl]amino]-7-oxo-,monosodium salt, [2S-[2a,5a,6a,6(S*)]]-; BRL 20330