6-(2-Amino-2-phenyl-acetylamino)-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid AIDS-070041 AIDS070041 AMP & BL-P2090 compound with 3,3-dimethyl-7-oxo-6-trifluoromethanesulfonyloxy-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid (1:1)