Dianicline is a α4β2 nicotinic acetylcholine receptor partial agonist, a class of drugs that includes varenicline and cytisine for smoking cessation. Dianicline increases cessation rates in a dose-dependent manner[1].
[1]. Tonstad S, et al. Dianicline, a novel α4β2 nicotinic acetylcholine receptor partial agonist, for smoking cessation: a randomized placebo-controlled clinical trial. Nicotine Tob Res. 2011 Jan;13(1):1-6.