title: [Studies on the diterpenoids on Teucrium quadrifarium Buch-Ham].
abstract: Six neo-clerodane diterpenoids were isolated from the acetone extract of Teucrium quadrifarium Buch-Ham (I, II, IV, V, VI and VII). Five of them (I, II, IV, V and VII) were identified as known compounds, teucvidin, 12-epi-teucvidin, teuflin, 19-acetyl-teuspinin and teucvidin, respectively. Compound VI was found to be a new neo-clerodane diterpene, named teuquadrin B. Its structure has been determined from the physical and spectral data.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Zhu
authors.forename: G Y
authors.initials: GY
authors.lastname: Li
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification*; D001572:Benzofurans / Q000737:chemistry / Q000302:isolation & purification*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D015394:Molecular Structure; D013141:Spiro Compounds / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D001572:Benzofurans; D004365:Drugs, Chinese Herbal; D013141:Spiro Compounds; C087801:teuquadrin B