α3-DEACETOXY-7-(α-AMINO-1-CYCLOHEXENYLACETAMIDO) CEPHALOSPORANIC ACID (SCE-100), A NEW SEMISYNTHETIC CEPHALOSPORIN. III

COMPARATIVE STUDIES ON ABSORPTION, DISTRIBUTION AND EXCRETION OF SCE-100 AND CEPHALEXIN (CEX) IN LABORATORY ANIMALS

Abstract

3-Deacetoxy-7-(α-amino-1-cyclohexenylacetoamido) cephalosporanic acid (SCE-100) was compared to cephalexin with respect to absorption, tissue distribution, and urinary and biliary excretion in mice, rats, rabbits and dogs. The absorption of SCE-100 after oral administration is generally slower than that of cephalexin, but its disappearance from blood and tissues is delayed. The concentration of SCE-100 in the liver is distinctly higher than that of cephalexin. These properties of SCE-100 are most clearly manifested in rats. There is no significant difference in urinary excretion of the two cephalosporins in rabbits and dogs, while in rabbits, biliary excretion of SCE-100 is more intensive than that of cephalexin.