Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 6-(3,5-dibromo-2,6-dimethoxybenzamido)-3,3-dimethyl-7-oxo-, sodium salt(7CI); 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,6-[(3,5-dibromo-2,6-dimethoxybenzoyl)amino]-3,3-dimethyl-7-oxo-, monosodiumsalt, [2S-(2a,5a,6b)]-; BRL 1428