Alazocine

Alazocine ((-)-SKF-10,047), or (-)-N-allylnormetazocine ((-)-ANMC), was the first drug discovered to act as a σ₁ receptor agonist (K_i = 24 nM). It has no significant affinity for the σ₂ receptor. Alazocine also acts as a κ-opioid receptor partial agonist (K_i = 0.4 nM; EC₅₀ = 24 nM; E_max = 66%), and to a much lesser extent, as an NMDA receptor antagonist (K_i = 587 nM).