title: Potential antitumor-promoting diterpenes from the cones of Pinus luchuensis.
abstract: A new nor-labdane-type diterpene, 15-nor-labda-8(17),12E-dien-13,19-dienoic acid (1), along with five known diterpenes, 15-nor-14-oxolabda-8(17),12E-dien-19-oic acid (2), trans-communic acid (3), sandaracopimaric acid (4), dehydroabietic acid (5), and abieta-8,11,13-triene-15,18-diol (6), was isolated from the cones of Pinus luchuensis. The structure of 1 was established by chemical and spectroscopic methods. Among these isolates, compounds 2, 4, and 6 showed potent inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation induced by the tumor promoter 12-O-tetradecanoylphorbol 13-acetate.
authors.affiliation: Department of Medicinal Chemistry, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan.
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Minami
authors.forename: Shun-ichi
authors.initials: S
authors.lastname: Wada
authors.forename: Harukuni
authors.initials: H
authors.lastname: Tokuda
authors.forename: Genzoh
authors.initials: G
authors.lastname: Tanabe
authors.forename: Osamu
authors.initials: O
authors.lastname: Muraoka
authors.forename: Reiko
authors.initials: R
authors.lastname: Tanaka
mesh_terms: D000956:Antigens, Viral / Q000187:drug effects; D000998:Antiviral Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002855:Chromatography, Thin Layer; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007564:Japan; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D028223:Pinus / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D013237:Stereoisomerism; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D000956:Antigens, Viral; D000998:Antiviral Agents; D004224:Diterpenes; C033305:Epstein-Barr virus early antigen; D013755:Tetradecanoylphorbol Acetate