title: Dihydrophenanthrenes from the stems and leaves of Dioscorea nipponica Makino.
abstract: From the CHCl3-soluble portion of the 70% EtOH extract of the stems and leaves of Dioscorea nipponica Makino, two new dihydrophenanthrenes were isolated, 2,7-dihydroxy-3,4,6-trimethoxy-9,10-dihydrophenanthrene, and 4,4',7,7'-tetrahydroxy-2,2',6,6'-tetramethoxy-1,1'-bi-9,10-dihydrophenanthrenyl. The structures were determined by means of HRMS, 1H-NMR, 13C-NMR, and HMBC experiments.
authors.affiliation: Institute of Frontier Medical Science, Jilin University, Changchun 130021, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Lu
authors.forename: Jinping
authors.initials: J
authors.lastname: Liu
authors.forename: Pingya
authors.initials: P
authors.lastname: Li
mesh_terms: D027742:Dioscorea / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D000431:Ethanol; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D010616:Phenanthrenes / Q000737:chemistry / Q000302:isolation & purification*; D018515:Plant Leaves / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D004365:Drugs, Chinese Herbal; D010616:Phenanthrenes; D000431:Ethanol