Cephalosporin derivatives, and antibacterial drugs containing the derivatives
AssigneeEisai Co., Ltd.
InventorsYoshimasa Machida, Isao Saito, Motosuke Yamanaka, Seiichiro Nomoto, Shigeto Negi, Kyosuke Kitoh, Kanemasa Katsu, Yukio Ohya, Takeshi Suzuki, Kyoko Koizumi
Life of this patent
Estimating the term…
Abstract
New cephalosporin derivatives represented by the general formula: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 each represents hydroxy, acyloxy, and hydrogen provided that two or three of R.sub.1, R.sub.2, and R.sub.3 are not hydrogen at the same time, and their salts, and processes for the preparation thereof. The cephalosporin derivatives of the present invention are useful as antibacterial drugs.
Claims6
A cephalosporin derivative of the formula ##STR7## wherein R.sub.1, R.sub.2 and R.sub.3 each represents hydroxy, acetoxy, propionyloxy, or hydrogen, provided that two or three of R.sub.1, R.sub.2 and R.sub.3 are not hydrogen at the same time or a non-toxic salt thereof.
An antibacterial composition which comprises an antibacterially effective amount of a cephalosporin derivative of the formula ##STR8## wherein R.sub.1, R.sub.2 and R.sub.3 each represents hydroxy, acetoxy, propionyloxy, or hydrogen provided that two or three of R.sub.1, R.sub.2 and R.sub.3 are not hydrogen at the same time, or a non-toxic salt thereof and a pharmaceutically acceptable carrier therefor.
Dependencies are inferred from the claim text.