A spirohydantoin derivative of oxymorphone: An agonist with delayed antagonist activity

Add time:08/17/2019    Source:sciencedirect.com

We have synthesized a novel derivative of oxymorphone, oxymorphone-6α-spirohdantoin. The derivative was less toxic in mice than the parent compound and it showed a significant anticonvulsive activity. It exerted agonist effects in doses lower than those of morphine and its agonist effects were longer lasting. Furthermore, both oxymorphone and the 6-spirohydantoin showed definite antagonist properties 48 hr later: they prevented analgesic effects of morphine. The antagonist effects of the derivative persisted for a week.

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