title: New abietane diterpenoids from the mangrove Avicennia marina.
abstract: Phytochemical investigations of the twigs of Avicennia marina yielded three new abietane diterpenoids 11-hydroxy-8,11,13-abietatriene 12- O-beta-xylopyranoside ( 1), and a pair of inseparable epimers 6 Halpha-11,12,16-trihydroxy-6,7-secoabieta-8,11,13-triene-6,7-dial 11,6-hemiacetal ( 2) and 6 Hbeta-11,12,16-trihydroxy-6,7-secoabieta-8,11,13-triene-6,7-dial 11,6-hemiacetal ( 3), as well as the new lignan (7' S,8' R)-4,4',9'-trihydroxy-3,3',5,5'-tetramethoxy-7,8-dehydro-9-al-2,7'-cyclolignan ( 5), together with 6,11,12,16-tetrahydroxy-5,8,11,13-abitetetraen-7-one ( 4), lyoniresinol ( 6), lyoniresinol 9'- O-beta- D-glucopyranoside ( 7), and diacetylmartynoside ( 8). Structure elucidation of the new compounds was accomplished by analysis of their spectroscopic data. Compounds 2 - 4 showed moderate cytotoxic and antimicrobial activities.
authors.affiliation: Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Jena, Germany.
authors.forename: Li
authors.initials: L
authors.lastname: Han
authors.forename: Xueshi
authors.initials: X
authors.lastname: Huang
authors.forename: Hans-Martin
authors.initials: HM
authors.lastname: Dahse
authors.forename: Ute
authors.initials: U
authors.lastname: Moellmann
authors.forename: Susanne
authors.initials: S
authors.lastname: Grabley
authors.forename: Wenhan
authors.initials: W
authors.lastname: Lin
authors.forename: Isabel
authors.initials: I
authors.lastname: Sattler
mesh_terms: D045784:Abietanes / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000494:pharmacology; D032407:Avicennia / Q000737:chemistry*; D015394:Molecular Structure
chemical_list: D045784:Abietanes; D000900:Anti-Bacterial Agents; D000972:Antineoplastic Agents, Phytogenic