Brockhoff A, Behrens M, Massarotti A, Appendino G, Meyerhof W (2007). Broad tuning of the human bitter taste receptor hTAS2R46 to various sesquiterpene lactones, clerodane and labdane diterpenoids, strychnine, and denatonium. J Agric Food Chem 55(15): 6236-43. PubMed 17595105