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The separation of thevinone (2a) and β-thevinone (2b), as well as that of dihydrothevinone (3a) and β-dihydrothevinone (3b) was accomplished. By the application of various procedures numerous new N-substituted Diprenorphine analogues (8a-f) with 7R absolute configuration were synthesized. Detailed pharmacological investigation of the prepared compounds may contribute to a better understanding of the structure-activity relationship of morphine alkaloids.
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Marton et al. (1995) studied this question.
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