(2S,5R,6R)-6-[[(2R)-CARBOXY-3-THIENYLACETYL]AMINO]-3,3-DIMETHYL-7-OXO-4-THIA-1-AZABICYCLO[3.2.0]HEPTANE-2-CARBOXYLIC ACID DISODIUM SALT MLS000069614 SMR000058842