Studies on the Chemical Constituents of the Root of Rubia sylvatica Chemical constituents of Dendrobium crystallinum A new xanthone glycoside from Polygala crotalarioides Chemical constituents of Dendrobium crystallinum Effects of Tanguticum Maxim Polysaccharide on Ulcerative Colitis Induced by TNBS in Rats Studies on Chemical Constitutents from Penthorum chinense Pursh Separation and Purification of Chongzujueside Chemical constituents of Evodia lepta in Pattra medicine Studies on the Polyphenols from Leaves of Euphorbia hirta L Chemical constituents of higher fungus Russula foetens