Pentacosane is one of the major components in the acetone extract from Curcuma raktakanda and is also in the essential oil from the leaves of Malus domestica. Pentacosane exhibit anti-cancer activities.In Vitro: Pentacosane exhibits activities against C-6, A549 (lung carcinoma), CHOK1 (ovarian), and THP-1 (acute monocytic leukemia) cells.