## Abstract Antipain [(1‐carboxy‐2‐phenylethyl)carbamoyl‐L‐arginyl‐L‐valyl‐DL‐arginal] is a potent inhibitor of papain and related proteases. The assignment of ^1^H NMR signals of the interconverting forms in equilibrium in aqueous solution at pH 5.8 were investigated using two‐dimensional DQF‐COSY
The Structure of Diastereomeric Oxaprotiline Metabolites. An NMR Study
✍ Scribed by Tammo Winkler; Walter Dieterle; Paul Hung; Grety Rihs; Hans-Peter Kriemler
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- German
- Weight
- 297 KB
- Volume
- 67
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
The structure of phenolic metabolites of oxaprotiline, obtained from a study with rats and dogs, are assigned with NMR‐spectroscopic methods in combination with MS data and an X‐ray structure analysis of synthetic (9__R__*,2′S*)‐2‐chlorooxaprotiline, the metabolites are shown to be (9__R__*,2′R*)‐2‐hydroxy, 3‐hydroxy‐, and 2‐hydroxy‐3‐methoxyoxaprotiline, and (9__R__*,2′S*)‐2‐hydroxy‐, 3‐hydroxy‐, and 3‐hydroxy‐2‐methoxyoxaprotiline, as well as 2,6‐dihydroxyoxaprotiline.
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