Thymohydroquinone (Thymoquinol) is a monoterpenoid phenolic compound found in thyme, oregano, and other plants in the labiaceae family.

α-Conotoxin M I is a potent and selective inhibitor of mAChR and α1β1γδ nAChR, but has no effect on nicotine-stimulated dopamine release. α-Conotoxins are small, disulfide-rich peptides that competitively inhibit muscle and neuronal nicotinic AChRs.

Cernuoside B is a natural triterpenoid saponin that can be isolated from the roots of Pulsatilla koreana Nakai.