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Journal ArticleDOI

Chemical investigation of Cedrela toona

01 Oct 1971-Phytochemistry (Pergamon)-Vol. 10, Iss: 10, pp 2533-2535
TL;DR: Occurrence of 1,2-dihydrocedrelone, a new tetranortriterpenoid, provides further interesting evidence of the chemotaxonomic feature of Meliaceae.

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Abstract: Two varieties of Cedrela toona Roxb. are available in West Bengal and the seeds of one variety produces cedrelone, 1,2-dihydrocedrelone, bergapten and β-sitosterol. Occurrence of 1,2-dihydrocedrelone, a new tetranortriterpenoid, provides further interesting evidence of the chemotaxonomic feature of Meliaceae .

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Topics: Toona (59%), Cedrela (57%)
Citations
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Journal ArticleDOI
Qin-Gang Tan1, Xiao-Dong Luo1Institutions (1)
06 Sep 2011-Chemical Reviews
TL;DR: This paper aims to demonstrate the efforts towards in-situ applicability of EMMARM, as to provide real-time information about concrete mechanical properties such as E-modulus and compressive strength.

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Abstract: Natural Science Foundation of China[30000213, 30370160, 30670214]; National Basic Research Program of China (973 Program)[2009CB522300]; Chinese Academy of Sciences

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315 citations


Journal ArticleDOI
TL;DR: From a literature search for reports on the chemical constituents of these plants, most constituents were found to be quinone derivatives or other compounds with unsaturated carbonyl groups.

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Abstract: Seventy-five Myanmar timber extracts belonging to 27 families were examined for their leishmanicidal activities. Some timber extracts had significant leishmanicidal activity, especially extracts of Millettia pendula, which exhibited the most potent activity (MLC 3.1 μg/ml, MIC 1.6 μg/ml). Other timber extracts showing potent activity included those from Cedrela serrata, Cedrela toona, Cordia fragrantissima, Calophyllum kunstleri, Dalbergia cultrate, Grevillea robusta, Haplophragma adenophyllum, Michelia champaca, and Tectona grandis. From a literature search for reports on the chemical constituents of these plants, most constituents were found to be quinone derivatives or other compounds with unsaturated carbonyl groups.

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68 citations


Journal ArticleDOI
01 Jun 2000-Fitoterapia
TL;DR: Results show that cedrelone was the most effective in reducing rust pustule emergence, indicating the importance of specific structural features for activity.

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Abstract: Natural tetranortriterpenoids such as cedrelone from Toona ciliata, azadiradione from Azadirachta indica, limonin, limonol and nomilinic acid from Citrus medica, along with some cedrelone derivatives were tested for their antifungal activity against Puccinia arachidis, a groundnut rust pathogen. Results show that cedrelone was the most effective in reducing rust pustule emergence. Replacement of functional groups or modification of the A or the B ring in cedrelone reduced the effectiveness indicating the importance of specific structural features for activity.

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58 citations


Book ChapterDOI
D. A. H. Taylor1Institutions (1)
01 Jan 1984-
Abstract: The purpose of this article is to review the chemistry of the limonoids isolated from plants of the natural order Meliaceae; limonoids from the Rutaceae and Cneoraceae are not included. The chemistry of the limonoids was last reviewed in this series by Dreyer (84); a more recent review is by Connolly, Overton and Polonsky (73). Taxonomic aspects have been reviewed recently by the present author (199), and chemistry and phyto-chemistry have been discussed at a recent meeting (81). The present article sets out to review advances in limonoid chemistry since the last review in this series (84); the tables however are intended to be comprehensive.

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58 citations


Journal ArticleDOI
TL;DR: Evolutionary trends of meliacin chemistry thus correspond to the morphological division of the Meliaceae, according to their basic skeletal specialization and state of oxidation.

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Abstract: The structural types of limonoids or meliacins can be characterized in terms of complexity by their position along biosynthetic routes on a biogenetic map, as well as by their basic skeletal specialization and state of oxidation. Genera of the Melioidease, one major subfamily of the Meliaceae, contain meliacins formed along several biosynthetic routes and characterized by relatively low skeletal specializations and oxidation states. Genera of the Swietenioideas, the other major subfamily of the Meliceae, contain meliacins formed along only one biosynthetic route and characterized by relatively high skeletal specializations and oxidation states. Evolutionary trends of meliacin chemistry thus correspond to the morphological division of the Meliaceae.

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55 citations


References
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Journal ArticleDOI
T.A. Geissman1, Sumu Matsueda1Institutions (1)
01 Sep 1968-Phytochemistry
TL;DR: Diploid and polyploid forms of Ambrosia dumosa Gray have been found to differ markedly in chemical constitution, and the only identifiable lactonic constituent that is found in both forms is parthenolide.

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Abstract: Diploid and polyploid forms of Ambrosia dumosa Gray have been found to differ markedly in chemical constitution. From a diploid form were isolated four known lactones: coronopilin, ambrosiol, psilostachyin and parthenolide. From a polyploid form were isolated psilostachyin C and parthenolide; and two new lactones, burrodin and apoludin, the structures of which have been established. Parthenolide is the only identifiable lactonic constituent that is found in both forms.

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19 citations


Network Information
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No. of citations received by the Paper in previous years
YearCitations
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20184
20171
20151
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20123