Alnustone, a non-phenolic diarylheptanoid found in herbs and spices, is a constituent of Curcuma xanthorrhiza. Alnustone displays anti-emetic and anti-inflammatory activities[1][2].
[1]. SÜleyman GÖksu, et al. An efficient synthesis of alnustone, a naturally occurring compound. Turkish Journal of Chemistry 27(1):31-34. [2]. Claeson P, et al. Three non-phenolic diarylheptanoids with anti-inflammatory activity from Curcuma xanthorrhiza. Planta Med. 1993 Oct;59(5):451-4.