title: Enmein type diterpenoids from Isodon japonica.
abstract: Two enmein type diterpenoids, taibaijaponicains A and B, were isolated from the ethanol extract of the leaves and branches of Isodon japonica. Their structures are designated as 6beta,11alpha-dihydroxy-16alpha-methoxymethyl-6,20-epoxy-6,7-seco-ent-kaur-15-one-1,7-olide and 3beta-acetoxy-6beta,11alpha-dihydroxy-16alpha-methoxymethyl-6,20-epoxy-6,7-seco-ent-kaur-15-one-1,7-olide, respectively, on the basis of detailed spectroscopic analyses.
authors.affiliation: Department of Chemistry, Shaanxi Normal University, 710062, Xi'an, People's Republic of China. baolinli@snnu.edu.cn
authors.forename: B
authors.initials: B
authors.lastname: Li
authors.forename: X
authors.initials: X
authors.lastname: Tian
mesh_terms: D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D019686:Lamiaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D016339:Spectrometry, Mass, Fast Atom Bombardment
chemical_list: D004224:Diterpenes; C442168:taibaijaponicain A; C442167:taibaijaponicain B