1. Agrawal, P. K., Carbon-13 NMR spectrum of flavonoids, Elsevier, New York, p. 341, (1989).
2. Ahmad, V. U. and Rahman, A. U., Handbook of natural products data, vol. 2; Pentacyclic triterpenoids, Elsevier, New York, p. 566–567, (1994).
3. Batirov, E., Kh., Matkarimov, A. D., Malikov, V. M., and Yagudaev, M. R., Versicoside-a novel lignan glycoside fromHaplophyll versicolor.Khim. Prir. Soedin., 5, 624–628 (1985).
4. But, Paul P. H. Kimura, T. Guo, J. X., and Sung, C. K.,International collation of traditional and folk medicine: Part 2. World scientific, Singapore, p. 22–23, (1997).
5. Chiba, M., Okabe, K., Hisada, S., Shima, K., Takemoto, T., and Nishibe, S., Elucidation of the structure of a new lignan glucoside fromOlea europaea by carbon-13 nuclear magnetic resonance spectroscopy.Chem. Pharm. Bull., 27, 2868–2873 (1979).