No abstract

Salvinorin A (1), a neoclerodane diterpene from the hallucinogenic mint Salvia divinorum, is the only known non-nitrogenous and specific κ-opioid agonist. Several structural congeners of 1 isolated from Salvia splendens (2 -8) together with a series of semisynthetic derivatives (9 -24), some of which possess a pyrazoline structural moiety (9, 19 -22), have been tested for affinity at human μ, δ, and κ opioid receptors. None of these compounds showed high affinity binding to these receptors. However, 10 showed modest affinity for κ receptors suggesting other naturally neoclerodanes from different Salvia species may possess opioid affinity.

No abstract

No abstract