Abstract: Oxazolidinone hydroxamic acid derivatives of the general formula (I): where R1 is hydrogen or hexanoyl and R2 is amino, methyl, ethyl, propyl, isopropyl, cyclopropyl, butyl, isobutyl, cyclobutyl, pentyl, cyclopentyl, hexyl or heptyl, and pharmaceutically acceptable salts thereof, act as dual inhibitors of 5-lipoxygenase and mast cell degranulation. The oxazolidinone hydroxamic acid derivatives or pharmaceutically acceptable salts thereof can be used in the prevention and treatment of asthma and allergies, as well as inflammatory conditions.

Abstract: Oxazolidione hydroxamic acid derivatives of the general formula (I): where R1 is hydrogen or hexanoyl and R2 is amino, methyl, ethyl, propyl, isopropyl, cyclopropyl, butyl, isobutyl, cyclobutyl, pentyl, cyclopentyl, hexyl or heptyl, and pharmaceutically acceptable salts thereof, act as dual inhibitors of 5-lipoxygenase and mast cell degranulation. The oxazolidinone hydroxamic acid derivatives or pharmaceutically acceptable salts thereof can be used in the prevention and treatment of asthma and allergies, as well as inflammatory conditions.

Abstract: Novel 3-(substituted)-3-methyl-4-thia-1-azabicyclo?3.2.0!heptane-2-carboxylate, 4,4-dioxides which are of value for use in combination with .beta.-lactam antibiotics to increase the effectiveness of the antibiotics.