Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid,6-[3-(2-chloro-6-fluorophenyl)-5-methyl-4-isoxazolecarboxamido]-3,3-dimethyl-7-oxo-,monosodium salt, monohydrate (8CI); 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid,6-[[[3-(2-chloro-6-fluorophenyl)-5-methyl-4-isoxazolyl]carbonyl]amino]-3,3-dimethyl-7-oxo-,monosodium salt, monohydrate, [2S-(2a,5a,6b)]-; Sodium flucloxacillinmonohydrate