Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 3,3-dimethyl-6-(a-methylhydratropamido)-7-oxo-, sodium salt (7CI);4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-6-[(2-methyl-1-oxo-2-phenylpropyl)amino]-7-oxo-, monosodium salt,[2S-(2a,5a,6b)]-; BRL 1209