Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 7-[[(2-amino-4-thiazolyl)[[2-[2-(3,4-dihydroxybenzoyl)hydrazino]-1,1-dimethyl-2-oxoethoxy]imino]acetyl]amino]-3-[[(2-carboxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)thio]methyl]-8-oxo-,disodium salt, [6R-[6a,7b(Z)]]-;5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-[[(2Z)-(2-amino-4-thiazolyl)[[2-[2-(3,4-dihydroxybenzoyl)hydrazino]-1,1-dimethyl-2-oxoethoxy]imino]acetyl]amino]-3-[[(2-carboxy-5-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)thio]methyl]-8-oxo-,disodium salt, (6R,7R)- (9CI); Ro 09-1227; SR 1024