<chemical> 3,3-dimethyl-7-oxo-6-((phenylsulfoacetyl)amino)-4-thia-1- azabicyclo(3.2.0)heptane-2-carboxylic acid. Semisynthetic penicillin-type antibiotic. ... Pharmacological action: penicillins. ... Chemical name: 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-((phenylsulfoacetyl)amino)-, (2S-(2alpha,5alpha,6beta(S...