Entity

Time filter

Source Type

Srikakulam District, India

Chen W.,CAS South China Sea Institute of Oceanology | Chen W.,University of Chinese Academy of Sciences | Shen L.,Jinan University | Li M.,Jinan University | And 3 more authors.
Fitoterapia | Year: 2014

Four new limonoids, named granatumins V-Y (1-4), belonging to the small group of limonoids with a C1-C29 oxygen bridge and a â̂†8,30 double bond, were isolated from the seeds of an Indian mangrove, Xylocarpus granatum, collected in the swamp of Krishna estuary, Andhra Pradesh. The constitutions and absolute configurations of these compounds were established by extensive NMR investigations, single-crystal X-ray crystallography using Cu Kα radiation, and by the comparison of circular dichroism spectrum. © 2014 Elsevier B.V. Source


Wang H.,CAS South China Sea Institute of Oceanology | Wang H.,China Three Gorges University | Li M.-Y.,Jinan University | Katele F.Z.,University of Wurzburg | And 3 more authors.
Beilstein Journal of Organic Chemistry | Year: 2014

Decandrinin (1), an unprecedented C9-spiro-fused 7,8-seco-ent-abietane, was obtained from the bark of an Indian mangrove, Ceriops decandra, collected in the estuary of Godavari, Andhra Pradesh. The constitution and the relative configuration of 1 were determined by HRMS (ESI) and extensive NMR investigations, and the absolute configuration by circular dichroism (CD) and optical-rotatory dispersion (ORD) spectroscopy in combination with quantum-chemical calculations. Decandrinin is the first 7,8- seco-ent-abietane. © 2014 Wang et al; licensee Beilstein-Institut. Source


Zhang J.,Jilin Agricultural University | Yang S.-X.,Jilin Agricultural University | Yang X.-B.,Jilin Agricultural University | Li M.-Y.,CAS South China Sea Institute of Oceanology | And 4 more authors.
Chemical and Pharmaceutical Bulletin | Year: 2010

Two new mexicanolides, named xylomexicanolides A and B, were isolated from the seeds of an Indian mangrove, Xylocarpus moluccensis, together with four known limonoids, khayasin, angolensic acid methyl ester, khayasin T, and 2'S-methylbutanoylproceranolide. The structures of these limonoids were established on the basis of spectroscopic data. The 13C-NMR data of khayasin were reported for the first time. Khayasin was found to exhibit marked insecticidal activity against the fifth instar larvae of Brontispa longissima (GESTRO) at a concentration of 10 mg/l. © 2010 Pharmaceutical Society of Japan. Source


Li J.,CAS South China Sea Institute of Oceanology | Li J.,University of Chinese Academy of Sciences | Li M.-Y.,CAS South China Sea Institute of Oceanology | Li M.-Y.,University of Chinese Academy of Sciences | And 2 more authors.
Helvetica Chimica Acta | Year: 2011

Godavarin K (1), a new limonoid with an oxygen bridge between C(1) and C(29), was obtained from seeds of an Indian mangrove, Xylocarpus moluccensis, together with a known tetranortriterpene, 6-de(acetyloxy)-7-deacetylchisocheton compound E (=(5α,7α,13α,17α)-7-hydroxy-4,4,8-trimethyl- 3-oxocarda-1,14-dienolide; 2). The structure of godavarin K was established on the basis of spectroscopic data. In addition, the confusion of 1H- and 13C-NMR data for compound 2 in previous literature was clarified. Copyright © 2011 Verlag Helvetica Chimica Acta AG, Zürich, Switzerland. Source


Li M.-Y.,CAS South China Sea Institute of Oceanology | Li M.-Y.,University of Chinese Academy of Sciences | Zhang J.,Chinese Academy of Sciences | Feng G.,Chinese Academy of Sciences | And 2 more authors.
Journal of Pesticide Science | Year: 2011

Brontispa longissima (Gestro) is a serious pest of coconut palms in tropical areas. In our continuing search for potential pesticides from tropical mangrove plants, khayasin (1) and 2'S-methylbutanoylproceranolide (2), two mexicanolides with a Δ8,14 double bond, were isolated from seeds of an Indian mangrove, Xylocarpus moluccensis. The structures of these compounds were established by comparison with data in the literature. Compound 1 was found to exhibit potent insecticidal activities against second- to fifth-instar larvae of B. longissima at a concentration of 50μ g/ml, and compound 2 displayed marked insecticidal activity against fifth-instar larvae of the same pest at the same concentration. LC50 (concentration of 50% mortality) values for compound 1 against fifthinstar larvae of B. longissima at exposure times of 24 and 48 h are 7.27 and 3.39μg/ml, respectively, and those for compound 2 are 10.57 and 4.03μg/mL, respectively. The insecticidal activities of compounds 1 and 2 against fifth-instar larvae of B. longissima are more potent than those of azadirachtin and toosendanin, and are similar to those of rotenone; however, compounds 1 and 2 only exhibited moderate antifeedant activities against third-instar larvae of Prodenia litura (Fabricius). These results suggested that compounds 1 and 2 had selectively insecticidal activities against the larvae of B. longissima. They are promising candidate insecticides for the control of B. longissima. © Pesticide Science Society of Japan. Source

Discover hidden collaborations