5-Thia-1-azabicylo(4.2.0)oct-2-ene-2-carboxylic acid, 7-(((2-amino-4-thiazolyl)((1-carboxy-1-methylethoxy)imino)acetyl)amino)-3-(((4-carboxy-2,3-dihydro-3-oxo-5-isothiazolyl)thio)methyl)-8-oxo-, trisodium salt, (6R-(6alpha,7beta(Z)))- 92071-93-7 YM 13115 YM-13115