d-.alpha.-Isobutylsulfobenzylpenicillin hemi-solvate crystals
AssigneeTakeda Chemical Industries, Ltd.
InventorsKeiichi Sugimoto, Koji Nishijima, Tadashi Hanaoka, Hiroshi Akimoto, Nobuharu Kakeya
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Abstract
Novel d-.alpha.-isobutylsulfobenzylpenicillin hemi-solvate crystals of the formula: ##STR1## (wherein A is a solvent selected from the class consisting of alcohols, ketones, ethers and esters) have excellent antibacterial activities and improved stability in terms of shelf-life.
Claims7
Pure d-.alpha.-Isobutylsulfobenzylpenicillin hemi-solvate crystals of the formula ##STR4## wherein A is a solvent selected from the group consisting of alcohols of 1 to 4 carbon atoms, ethers of 4 to 6 carbon atoms, ketones of 3 to 6 carbon atoms and esters of 3 to 6 carbon atoms.
Dependencies are inferred from the claim text.