Structure and bioactivity of the polysaccharides in medicinal plant Dendrobium huoshanense - Hsieh, Y S; Chien, C; Liao, S K; Liao, S F; Hung, W T; Yang, W B; Lin, C C; Cheng, T J; Chang, C C; Fang, J M; Wong, C H (Bioorg Med Chem, 2008)