Cytisine (CAS: 485-35-8)is a natural quinolizidine alkaloid extracted from Laburnum anagyroides and related Fabaceae plants. With ≥98% purity verified by HPLC, Cytisine is widely used in pharmaceutical and biomedical research as a selective nicotinic acetylcholine receptor (nAChR) partial agonist. It serves as a valuable compound for studies on smoking cessation, neuroprotection, and receptor–ligand interactions. Supplied with complete COA, HPLC, MS, and NMR data for research use only.