title: Novel diterpenes from the heartwood of Chamaecyparis obtusa var. formosana.
abstract: Two novel diterpenes, obtusanal B (1) and obtusadione (2), along with obtusanal A (3), obtunone (4), 12-hydroxy-6,7-secoabieta-8,11,13-triene-6,7-dial, 8,12-dihydroxydielmentha-5,9-diene-7,11-dione and myrcene, isolated from the heartwood of Chamaecyparis obtusa var. formosana, were characterized by spectroscopic means, including 2D-NMR techniques. Compounds 1 and 2 are 7(6-->2)abeoabietane and 14(8-->9)abeoabietane type diterpenes, respectively. Their biosyntheses were proposed.
authors.affiliation: Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, ROC. yhkuo@ccms.ntu.edu.tw
authors.forename: Yueh-Hsiung
authors.initials: YH
authors.lastname: Kuo
authors.forename: Chia-Hsien
authors.initials: CH
authors.lastname: Chen
authors.forename: Shih-Chang
authors.initials: SC
authors.lastname: Chien
authors.forename: Hsiu-Chuan
authors.initials: HC
authors.lastname: Lin
mesh_terms: D029780:Chamaecyparis; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D024301:Plant Bark; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D014934:Wood
chemical_list: D004224:Diterpenes; D010936:Plant Extracts