title: Six new triterpenoids and other triterpenoids and steroids from three Quercus species of Hong Kong.
mesh_terms: D006723:Hong Kong; D008722:Methods; D010936:Plant Extracts / Q000302:isolation & purification; D010946:Plants, Medicinal; D013256:Steroids / Q000302:isolation & purification*; D014315:Triterpenes / Q000302:isolation & purification*
chemical_list: D010936:Plant Extracts; D013256:Steroids; D014315:Triterpenes