title: Bis-spirolabdane-type diterpenoids from Leonurus sibiricus.
abstract: Six new bis-spirolabdane-type diterpenoids, leosibirinone A (1), 3alpha-acetoxyleoheteronone C (2), leosibirinone B (3), 3alpha-hydroxyleoheteronone A (4), 3alpha-acetoxyleoheteronone E (5), and 3alpha-acetoxy-15-epileoheteronone E (6), were isolated from the aerial parts of Leonurus sibiricus. Their structures were identified on the basis of 1D and 2D NMR, including (1)H-(1)H COSY, HSQC, HMBC, and NOESY spectroscopic analyses.
authors.affiliation: College of Pharmacy, Chosun University, Gwangju 501-759, Republic of Korea.
authors.forename: Hyun Teak
authors.initials: HT
authors.lastname: Moon
authors.forename: Qinglong
authors.initials: Q
authors.lastname: Jin
authors.forename: Ji Eun
authors.initials: JE
authors.lastname: Shin
authors.forename: Eun Jin
authors.initials: EJ
authors.lastname: Choi
authors.forename: Hyo-Kyung
authors.initials: HK
authors.lastname: Han
authors.forename: Yeong Shik
authors.initials: YS
authors.lastname: Kim
authors.forename: Eun-Rhan
authors.initials: ER
authors.lastname: Woo
mesh_terms: D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification*; D007723:Korea; D031332:Leonurus / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D013237:Stereoisomerism
chemical_list: D004224:Diterpenes