196309-77-0 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-6-((2-(4-(2-methylpropyl)phenyl)-1-oxopropyl)amino)-7-oxo-, monosodium salt, (2S-(2-alpha,5-alpha,6-beta))-(partial)- Ibucillin sodium alpha-Methyl-4-(isobutyl) benzyl penicillin sodium