Methicillin Monohydrate, Monosodium Salt
4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic Acid, 6-((2,6-dimethoxybenzoyl)amino)-3,3-dimethyl-7-oxo-, Monosodium Salt, Monohydrate,(2S-(2alpha,5alpha,6beta))-