Cytisine is a naturally occurring quinolizidine alkaloid from Cytisus laburnum that acts as a partial nicotinic acetylcholine receptor agonist, used as a smoking-cessation pharmacotherapy, and as a plant-derived lead structure for the development of synthetic partial nicotinic agonists including varenicline. Simson Pharma's Cytisine reference standard and impurities support QC for this plant-derived therapeutic.

Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) supply high-quality Cytisine Reference Standards, pharmacopoeial reference materials, and its related impurities to pharmaceutical manufacturers, CROs, analytical laboratories, universities, and regulatory organizations worldwide. To service the Europe and America market efficiently, Simson Pharma Limited has set up Simson Pharma Global Ltd. in United Kingdom and Simson Pharma Global LLC in USA respectively.