title: Limonoids from the seeds of a Godavari mangrove, Xylocarpus moluccensis.
abstract: Ten limonoids, named godavarins A-J (1-7, 9-11), were isolated from seeds of an Indian mangrove (Xylocarpus moluccensis) collected in the mangrove wetlands of Godavari estuary, Andhra Pradesh. Eight known limonoids, viz. xyloccensins L (8), P (12), Q (13), mexicanolide (14), 6-deoxy-3-detigloyl-swietenine acetate (15), fissinolide (16), methyl 3β-acetoxy-1-oxomeliaca-8(30),14-dienoate (17), and methyl 3β-acetoxy-1-oxomeliaca-8(9),14-dienoate (18), were also obtained. The structures of these compounds were established on the basis of spectroscopic data or comparison with data in the literature (known compounds). The stereostructure of godavarin D was confirmed by means of single-crystal X-ray analysis. Godavarins A-C are the first mexicanolide derivatives with a C₇-C₂₈ ester-linked δ-lactone ring, while godavarins D-G are further additions to the small group of limonoids with a C₁-C₂₉ oxygen bridge. Godavarin H is a phragmalin with five acetoxy groups. Two limonoids, mexicanolide and fissinolide, were found to exhibit marked antifeedant activity against the third-instar larvae of Brontispa longissima (Gestro) at a concentration of 0.5 mg/mL. The most potent compound was mexicanolide. It also showed moderate insecticidal activity.
authors.affiliation: Key Laboratory of Marine Bio-resources Sustainable Utilization, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Min-Yi
authors.initials: MY
authors.lastname: Li
authors.forename: Gang
authors.initials: G
authors.lastname: Feng
authors.forename: Qiang
authors.initials: Q
authors.lastname: Xiao
authors.forename: Jari
authors.initials: J
authors.lastname: Sinkkonen
authors.forename: Tirumani
authors.initials: T
authors.lastname: Satyanandamurty
authors.forename: Jun
authors.initials: J
authors.lastname: Wu
mesh_terms: D000818:Animals; D001517:Coleoptera / Q000187:drug effects; D018360:Crystallography, X-Ray; D005247:Feeding Behavior / Q000187:drug effects; D007194:India; D007306:Insecticides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007814:Larva / Q000187:drug effects; D036701:Limonins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D043982:Rhizophoraceae / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry
chemical_list: D007306:Insecticides; D036701:Limonins; C554990:fissinolide; C554989:mexicanolide