14796-35-1 2-(2'-Carboxyphenyl)benzoyl-6-aminopenicillanic acid 2-Cbapa 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-(((2'-carboxy(1,1'-biphenyl)-2-yl)carbonyl)amino)-3,3-dimethyl-7-oxo-, (2S-(2alpha,5alpha,6beta))-