4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,6-[[[3-(2-chloro-6-fluorophenyl)-5-methyl-4-isoxazolyl]carbonyl]amino]-3,3-dimethyl-7-oxo-, monosodium salt, (2S,5R,6R)-

4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,6-[[[3-(2-chloro-6-fluorophenyl)-5-methyl-4-isoxazolyl]carbonyl]amino]-3,3-dimethyl-7-oxo-, monosodium salt, (2S,5R,6R)-