title: Diterpenoids from the leaves of Juniperus chinensis var. kaizuka.
abstract: Two diterpenoids based on novel carbon skeletons, namely, 8,19-dioxo-8,14-seco-chinan-14,11-olide (1) and 8-oxo-8,14-seco-abiet-12-en-14,19-dial (2), have been isolated, together with two new abietane diterpenoids, 13 beta,14 beta-epoxyabiet-7-en-19,6 beta-olide (3) and 7 beta-hydroxyabieta-8,11,13-trien-19-al (4), from the leaves of Juniperus chinensis. Their structures were determined by spectroscopic methods, including 2D NMR, and, in the case of 1, X-ray crystallographic analysis.
authors.affiliation: Department of Food Nutrition, Chung-Hwai College of Medical Technology, Tainan 717, Taiwan, Republic of China. cklee@mail.hwai.edu.tw
authors.forename: C K
authors.initials: CK
authors.lastname: Lee
authors.forename: Y S
authors.initials: YS
authors.lastname: Cheng
mesh_terms: D018360:Crystallography, X-Ray; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D004224:Diterpenes