Compounds having kappa opioid agonist activity, compositions containing them and method of using them as analgesics are provided. The compounds of formula having the structure: ##STR1## wherein R.sub.1, R.sub.2, and X Y, Z, Ar and n are as described in the specification.

Обеспечены смеси имея деятельность при агониста opioid kappa, составы содержа их и метод использования их как аналгетики. Смеси формулы имея структуру: ## ## STR1 при котором R.sub.1, R.sub.2, и х ы, з, Ar и н как описано в спецификации.

 
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> Therapeutic methods utilizing naturally derived bio-active complexes and delivery systems therefor

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