Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 6-(2-methoxy-1-naphthamido)-3,3-dimethyl-7-oxo-, monosodium salt(7CI,8CI); 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,6-[[(2-methoxy-1-naphthalenyl)carbonyl]amino]-3,3-dimethyl-7-oxo-, monosodiumsalt, (2S,5R,6R)- (9CI); 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,6-[[(2-methoxy-1-naphthalenyl)carbonyl]amino]-3,3-dimethyl-7-oxo-, monosodiumsalt, [2S-(2a,5a,6b)]-; BRL 1336