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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.


Wu J.,CAS South China Sea Institute of Oceanology | Yang S.-X.,Jilin Agricultural University | Li M.-Y.,CAS South China Sea Institute of Oceanology | Li M.-Y.,University of Chinese Academy of Sciences | And 5 more authors.
Journal of Natural Products | Year: 2010

Six new phragmalins, moluccensins H-M (1-6), two new andirobin-type limonoids, moluccensins N and O (7, 8), and two new tirucallane derivatives, moluccensins P and Q (9, 10), were isolated from seeds of an Indian mangrove, Xylocarpus moluccensis, together with the known compound 3β,22S- dihydroxytirucalla-7,24-dien-23-one. The structures of these compounds were established on the basis of spectroscopic data. Moluccensins H-L were phragmalins with a C-30 carbonyl group, and moluccensin M was a unique ring-D-opened 16-norphragmalin. Moluccensins H-J possess conjugated Δ8,9 and Δ14,15 double bonds, moluccensins K and L contain a Δ8,14 double bond, and moluccensin M has a characteristic C15-C30 linked five-membered lactone ring. Moluccensins H and I showed moderate insecticidal activity against the fifth instar larvae of Brontispa longissima (Gestro) at a concentration of 100 mg/L. © 2010 The American Chemical Society and American Society of Pharmacognosy.


Li Z.,Chinese Academy of Agricultural Sciences | Pan B.,Academy of Tropical Agriculture science of China | Lin Y.,Academy of Tropical Agriculture science of China | Jiang L.,Academy of Tropical Agriculture science of China | Liu Y.,Academy of Tropical Agriculture science of China
Journal of Ecology and Rural Environment | Year: 2013

To explore impacts of a new pesticide adjuvant LD 10 (patent license number: 200810103519. 7) and two commonly used pesticide adjuvants NP - 10 and NP -4 on non-target organisms in soil, acute toxicities of LD - 10, NP-10 and NP 4 to earthworm (Eisenia fetida) in natural soil and sterilized soil were determined. Results show that in the natural soil, the 7 d w(LC50) of LD-10, NP - 10 and NP - 4 for earthworm was 482. 58, 1 077. 50 and 343. 17 mg · kg-1, respectively, and 14 d w(LC50) 438. 38, 984. 64 and 316. 65 mg · kg-1, respectively, and in the sterilized soil, the 7 d w(LC50) of LD - 10, NP - 10 and NP -4 for earthworm was 350. 71, 960. 95 and 309. 63 mg · kg-1, respectively, and 14 d w(LC,0) 320. 24, 745. 99 and 274. 76 mg · kg-1, respectively, which shows that in both the natural and sterilized soils, the three agents are all low in toxicity to the earthworm, and follow the order of NP - 10 < LD - 10 < NP - 4 in toxicity, however, they are more toxic in the sterilized soil than in the natural soil.

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