3-(2-hydroxy-ethylidene)-7-oxo-4-oxa-1-aza-bicyclo[3.2.0]heptane-2-carboxylate, compd. with 6-(2-Amino-2-phenyl-acetylamino)-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid (1 :1) AIDS-044769 AIDS044769 Ampicillin & Clavulanate Potassium