Keywords: غربالگری مجازی مبتنی بر لیگند; NAM; negative allosteric modulator; nAChRs; neuronal nicotinic acetylcholine receptors; HBK; HEPES-buffered Krebs; LBVS; ligand-based virtual screening; SBVS; structure-based virtual screening; SAR; structure-activity relationship; nh; Hill coefficient;