1. Chen, S. X., Hu, Q., and Liu, K. Y., Pharmacognostics studies on Rhododendron spinuliferum Franch. J. Chin. Ethnomed. Ethnophar., 23, 24–26 (1996).
2. Chen, Y. C., Lin-Shiau, S. Y., and Lin, J. K., Involvement of reactive oxygen species and caspase 3 activation in arsenite induce apoptosis. J. Cell. Physiol., 177, 323–324 (1998).
3. Denizot, F. and Lang, R., Rapid colorimetric assay for cell growth and survival. Modifications to the tetrazolium dye procedure giving improved sensitivity and reliability. J. Immunol. Methods, 89, 271–277 (1986).
4. Feng, Z. M., Wang, Y. H., and Zhang, P. C., The chemical constitutents of Rhododendron ovatum Planch. Acta Pharmaccutica Sinica, 40, 150–152 (2005).
5. Keun, Y. J., Jae, C. D., and Kun, H. S., Triterpene glycosides from the roots of Dipsacus asper. J. Nat. Prod., 56, 1912–1916 (1993).