Thorough phytochemical studies had been performed on various Malsyian medicinal plants, including Ardisia elliptica, Garcinia sp., Calophyllum sp., Piper sp., Polyalthia sp., Enicosanthellum pulchrum, Mitrella kentii, Kosia falvida, Erythrina variegata, Senna alata, Tabernaemontana macrocarpa, Anaxagorea javanica and Labisia pumila var. alata. Several novel compounds have been successfully isolated and determined, such as those belonging to xanthones, alkaloids, benzoquinones, flavonoids and triterpenoids.