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Xenobiotica
the fate of foreign compounds in biological systems
Volume 19, 1989 - Issue 2
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Original Article

Isolation and characterization of a new thio-glucuronide, a biliary metabolite of malotilate in rats

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Pages 209-216 | Received 21 Apr 1988, Accepted 07 Oct 1988, Published online: 30 Sep 2009
 

Abstract

1. The metabolism of malotilate, possessing a 1,3-dithiole ring, was studied in rats. A major biliary metabolite of malotilate was isolated and determined to be a thio-glucuronide of the dithiol formed by ring-opening, namely, 1-mercapto-2,2-di(isopropoxycarbonyl)-ethenyl 1-thio-β-D-glucosiduronic acid. The structure was elucidated by proton-n.m.r., 13C-n.m.r. and high-resolution mass spectrometry.

2. The thio-glucuronide was completely hydrolysed by β-glucuronidase. This enzymic reaction was inhibited by saccharo-1,4-lactone.

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