1. 2) Tran K. (ed.), “Medicinal Plants in Viet Nam,” WHO Regional Office for the Western Pacific Manila and Institute of Material Medica Hanoi, Science and Technology Publishing House, Hanoi, 1990, p. 271.
2. 3) Bwin D. M., Gwan U. S. (ed.), “Burmese Indigenous Medicinal Plants: 1. Plants with reputed Hypoglycemic Action, Health and Myanmar Traditional Medicine,” Burma Medical Research Institute, Ministry of Health, Yangon. 1967, pp. 126—128.
3. Orthosiphol A and B, novel diterpenoid inhibitors of TPA (12-O-tetradecanoylphorbol-13-acetate)-induced inflammation, from Orthosiphon stamineus
4. Orthosiphol D and E, minor diterpenes from Orthosiphon stamineus