Results 201 to 210 of about 7,068 (252)

limonoids from Khaya senegalensis

Phytochemistry, 1998
A new limonoid was isolated from the bark of Khaya senegalensis and identified as 2,6-dihydroxyfissinolide. The assignments of some signals in the (13)C NMR spectrum of fissinolide have been reversed and the signals of the (1)H NMR spectrum of methyl 3beta-acetoxy-6-hydroxy-1-oxomeliac-14-enoate have been assigned.
Khalid, Sami, Friedrichsen, Gerda, Kharazmi, Arsalan, Theander, Thor, Olsen, Carl, Brøgger Christensen, S   +5 more
openaire   +2 more sources

Limonoids from Cipadessa baccifera

Journal of Natural Products, 2020
Eighteen new limonoids, including eight methyl angolensates (1-8) and 10 cipadesins (9-18), were isolated from the leaves of Cipadessa baccifera. Their structures were characterized by means of spectroscopic data analyses, single-crystal X-ray diffraction, and quantum chemistry computational methods. The C-6 configurations in those compounds possessing
Jin-Hai Yu, Hua Zhang, Bin Zhou, Flavia M. Zimbres, Seema Dalal, Qun-Fang Liu, Maria B. Cassera, Jian-Min Yue   +7 more
openaire   +2 more sources

Phragmalin Limonoids from Chukrasia tabularis

ChemInform, 2004
Six phragmalin limonoids, named tabulalin and tabulalides A-E, were isolated from the root bark of Chukrasia tabularis (Meliaceae). Their structures were determined by spectroscopic methods, and their antifeedant properties evaluated.
Munehiro, Nakatani, Samir A M, Abdelgaleil, Mona M G, Saad, Ruo C, Huang, Matsumi, Doe, Tetsuo, Iwagawa   +5 more
openaire   +2 more sources

Limonoids from Azadirachta excelsa

Phytochemistry, 1998
Activity-directed fractionation of a stem extract of Azadirachta excelsa using KB (human oral epidermoid carcinoma) cells led to the isolation of four meliacin-type limonoids. Two of these constituents were novel, namely, 2,3-dihydronimbolide and 3-deoxymethylnimbidate, and these were purified along with the known compounds, nimbolide and 28 ...
B, Cui, H, Chai, H L, Constant, T, Santisuk, V, Reutrakul, C W, Beecher, N R, Farnsworth, G A, Cordell, J M, Pezzuto, A D, Kinghorn   +9 more
openaire   +2 more sources

A limonoid from Trichilia estipulata

Phytochemistry, 2000
The limonoid 21,24,25,26,27-pentanor-15,22-oxo-7alpha,23-dihydroxy-apotirucalla(eupha)-1-en-3-one was isolated from the dichloromethane extract of the stem bark of Trichilia estipulata. Its structure was established by spectroscopic methods (UV, EIMS, 1H and 13C NMR, HMQC and HMBC).
D A, Cortez, J B, Fernandes, P C, Vieira, M F, da Silva, A G, Ferreira   +4 more
openaire   +2 more sources

Limonoids from Turraea floribunda (Meliaceae)

Phytochemistry, 2004
Six novel limonoids and limonoid derivatives, turraflorins D-I along with the known turraflorins A and B have been isolated from seed of the South African Turraea floribunda (Meliaceae).
Kathryn, McFarland, Dulcie A, Mulholland, Leigh-Anne, Fraser   +2 more
openaire   +2 more sources

Limonoid derivatives from Astrotrichilia voamatata

Phytochemistry, 2000
The stem bark of Astrotrichilia voamatata (Meliaceae) has yielded the novel limonoids voamatins C and D. These compounds represent a new type of pentanortriterpenoid and are unique in containing a ring A cyclic ether.
D A, Mulholland, M, Randrianarivelojosia, C, Lavaud, J M, Nuzillard, S L, Schwikkard   +4 more
openaire   +2 more sources

Melanogenesis‐Inhibitory Activities of Isomeric C‐seco Limonoids and Deesterified Limonoids

Chemistry & Biodiversity, 2016
Treatment of eight C‐seco limonoids including six of salannin‐type, 1 – 6, and two of nimbin‐type, 7 and 8, with a combination of BF3 · Et2O and iodide ion yielded the isomeric C‐seco derivatives, i.e., six isosalannins, 1a – 6a, and two isonimbins, 7a and 8a, respectively.
Toshihiro, Akihisa, Maiko, Horiuchi, Masahiro, Matsumoto, Eri, Ogihara, Kenta, Ishii, Jie, Zhang   +5 more
openaire   +2 more sources

Xylomolones A-D from the Thai Mangrove Xylocarpus moluccensis: Assignment of Absolute Stereostructures and Unveiling a Convergent Strategy for Limonoid Biosynthesis.

Journal of Organic Chemistry, 2019
Two new 9,10- seco limonoids with a central 3,4-dihydro-2 H-pyran motif, named xylomolones A and B (1 and 2, respectively), possessing identical absolute configurations but reversed alignments of ring A, compared to the tricyclic core of rings B-D, were ...
Wan‐Shan Li, A. Mándi, Jun-jun Liu, Li Shen, T. Kurtán, Jun Wu   +5 more
semanticscholar   +1 more source

Cytotoxic Limonoids from Melia azedarach

Planta Medica, 2012
Five new compounds (1-5), including two limonoids, one triterpenoid, one steroid, and one sesquiterpenoid, along with nine known limonoids (6-14), were isolated from the bark of Melia azedarach. The structures of the new compounds were elucidated by 2D NMR spectroscopy and mass spectrometry.
Chun-Mao, Yuan, Yu, Zhang, Gui-Hua, Tang, Yan, Li, Hong-Ping, He, Shi-Fei, Li, Li, Hou, Xing-Yao, Li, Ying-Tong, Di, Shun-Lin, Li, Hui-Ming, Hua, Xiao-Jiang, Hao   +11 more
openaire   +2 more sources