title: Three new compounds from Isodon melissoides.
abstract: Reinvestigation of the aerial parts of Isodon melissoides has afforded two new ent-diterpenoids, melissoidesins V (1) and W (2), together with five known ones, glabcensin W (3), melissoidesin C (4), melissoidesin A (5), melissoidesin B (6) and melissoidesin D (7), one new ionone derivative 3alpha,4alpha-isopropyliden-beta-ionol (8), as well as three analogues, 3-hydroxy-4-oxo-beta-ionol (9), megastigma-7-en-3,5,6,9-tetraol (10) and blumenol A (11), and three phenolic compounds salicylic acid (12), syringic acid (13) and cirsiliol (14). The new structures were elucidated on the basis of spectroscopic techniques, especially the 2D-NMR spectral analysis.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China.
authors.forename: Ai-Hua
authors.initials: AH
authors.lastname: Zhao
authors.forename: Rong-Tao
authors.initials: RT
authors.lastname: Li
authors.forename: Bei
authors.initials: B
authors.lastname: Jiang
authors.forename: Ji-Xia
authors.initials: JX
authors.lastname: Zhang
authors.forename: Qin-Shi
authors.initials: QS
authors.lastname: Zhao
authors.forename: Han-Dong
authors.initials: HD
authors.lastname: Sun
mesh_terms: D002850:Chromatography, Gel; D045786:Diterpenes, Kaurane / Q000737:chemistry / Q000302:isolation & purification*; D037602:Isodon / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009904:Optical Rotation; D035261:Plant Components, Aerial / Q000737:chemistry; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D045786:Diterpenes, Kaurane