RJR-2403 oxalate is a highly selective agonist of α4β2 subtype nicotinic receptor.

(Z)-Metanicotine 2HCl has analgesic activity and is used in the treatment of central system disorders.

Rivanicline hemioxalate, also known as RJR-2403 hemioxalate or (E)-Metanicotine hemioxalate, is a chemical compound acting as a neuronal nicotinic receptor agonist with pronounced selectivity for the α4β2 receptor subtype, showing over 1,000-fold greater selectivity for this subtype (Ki=26 nM) compared to α7 receptors (Ki=3.6 μM). Its in vitro studies demonstrate no significant activation of nAChRs in PC12 cells, muscle type nAChRs, or muscarinic receptors at concentrations up to 1 mM. Furthermore, Rivanicline displayed less than one-tenth the potency of nicotine in inducing ileum contraction, with substantially lower efficacy, and failed to antagonize nicotine-induced stimulation of muscle or ganglionic nAChR functions, with an IC50 value greater than 1 mM. Chronic exposure to Rivanicline at 10 microM led to up-regulation of high-affinity nAChRs in M10 cells, mimicking effects observed with nicotine. In vivo studies revealed that Rivanicline significantly reversed scopolamine-induced amnesia and improved working and reference memory in a rat model, while being 15 to 30 times less potent than nicotine in affecting body temperature, respiration, and other physiological responses. Metanicitone’s potency was approximately five times lower than nicotine in tail-flick tests following subcutaneous administration, yet slightly more potent upon central administration.

Metanicotine is a selective nicotinic agonist with antinociceptive properties.

Rivanicline is a neuronal nicotinic receptor agonist, showing high selectivity for the α4β2 subtype (Ki=26 nM). It show > 1,000 fold selectivity than α7 receptors(Ki= 36000 nM and IC50 : 26 nM).

Rivanicline oxalate is an agonist of neuronal nicotinic receptor, showing high selectivity for the α4β2 subtype (Ki=26 nM).