title: Diterpenoid quinones from rosemary (Rosmarinus officinalis L.).
abstract: Two new abietane-type diterpenoid o-quinones, 7beta-methoxyabieta-8,13-diene-11,12-dione-(20,6beta)-olide (rosmaquinone A) (1) and 7alpha-methoxyabieta-8,13-diene-11,12-dione-(20,6beta)-olide (rosmaquinone B) (2), together with six known compounds were isolated from the aerial parts of Rosmarinus officinalis L. The structures of the new compounds were determined by extensive spectroscopic analysis, including IR, UV, HR-EIMS, 1D and 2D 400 MHz NMR data (1H, 13C NMR, DEPT, 1H-1H COSY, HMQC, HMBC and NOEs).
authors.affiliation: Department of Chemistry, Faculty of Science, El-Minia University, El-Minia 61519, Egypt. amahmoud64@yahoo.com
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Mahmoud
authors.forename: Shar S
authors.initials: SS
authors.lastname: Al-Shihry
authors.forename: Byeng W
authors.initials: BW
authors.lastname: Son
mesh_terms: D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D035261:Plant Components, Aerial / Q000737:chemistry; D011809:Quinones / Q000737:chemistry* / Q000302:isolation & purification; D027542:Rosmarinus / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: D004224:Diterpenes; D011809:Quinones; C505171:rosmaquinone A