The Isolation and Characterization of Triterpenoid Constituents from Maytenus confertiflora Lou et Chen NEWTAXA OF MAYTENUS MOLINA IN CHINA ANATOMY OF LEAVES ON 17 SPECIES AND ONE VARIETY OF MAYTENUS IN TELATION YO CLASSIFICATION A NEW PENTACYCLIC TRITERPENE FROM MAYTENUS ORBICULATA A TAXON0MICAL PR0BLEM OF THE GENUS MAYTENUS M0LINA AND GYMN0SP0RIA (WIGHT & ARN.) BENTH & HO0K. F. FR0M CHINA Advances in Studies on Triterpenes Constituents and Their Biological Activities in Species of Maytenus Chemical Constitutents of the Suspension Cell Cultures of Maytenus hookeri Study on Anthraquinone Metabolites from an Endophytic Fungus lr88 Isolated from Maytenus hookeri