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Eight new triterpenoids isolated from dysoxylum grande (meliaceae) by various chromatographic techniques.

Due to the lack of scientific investigation on Dysoxylum grande, chemical investigation on this plant icthyotoxic leaves was done. Thorough fractionation using various chromatographic techniques including High Performance Liquid Chromatography (HPLC) has led to the isolation and characterization of...

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Main Authors: Ismail, Intan Safinar, Low, K. W.
Format: Conference or Workshop Item
Language:English
English
Published: 2012
Online Access:http://psasir.upm.edu.my/id/eprint/27331/1/ID%2027331.pdf
http://psasir.upm.edu.my/id/eprint/27331/
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spelling my.upm.eprints.273312014-04-08T09:22:33Z http://psasir.upm.edu.my/id/eprint/27331/ Eight new triterpenoids isolated from dysoxylum grande (meliaceae) by various chromatographic techniques. Ismail, Intan Safinar Low, K. W. Due to the lack of scientific investigation on Dysoxylum grande, chemical investigation on this plant icthyotoxic leaves was done. Thorough fractionation using various chromatographic techniques including High Performance Liquid Chromatography (HPLC) has led to the isolation and characterization of eight new triterpenoids. The new compounds were named as grandol A(1), B(2), C(3), D(4), E(5), F(6) and G(7)H. Another compound having a different configuration at C24 was assign as the new 20S, 24R0epoxy-7b, 25-dihydroxy-34-secodammar-4(28)-en-3-oic acid (8). All compounds were elucidated based on various spectroscopic data. Their relative configuration was established by 2D NMR data of NOESY. All compounds were tested for anti-acetylcholinesterase using Thin Layer Chromatography (TLC)-bioautography with fast blue B salt. Only grandol A91) and B(2) showed positive results with clear discoloration until at the concentration of 12.5 ppm. However, the obtained IC50 for both grandol A and B when using Ellman's method, was not significant (>200ug/ml) compared to galanthamine (1.955 ug/ml) or huperzine A (0.082 ug/ml[1,2] 2012 Conference or Workshop Item NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/27331/1/ID%2027331.pdf Ismail, Intan Safinar and Low, K. W. (2012) Eight new triterpenoids isolated from dysoxylum grande (meliaceae) by various chromatographic techniques. In: 8th International Symposium on Chromatography of Natural Products, 17-20 May 2012, Lublin, Poland. . English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description Due to the lack of scientific investigation on Dysoxylum grande, chemical investigation on this plant icthyotoxic leaves was done. Thorough fractionation using various chromatographic techniques including High Performance Liquid Chromatography (HPLC) has led to the isolation and characterization of eight new triterpenoids. The new compounds were named as grandol A(1), B(2), C(3), D(4), E(5), F(6) and G(7)H. Another compound having a different configuration at C24 was assign as the new 20S, 24R0epoxy-7b, 25-dihydroxy-34-secodammar-4(28)-en-3-oic acid (8). All compounds were elucidated based on various spectroscopic data. Their relative configuration was established by 2D NMR data of NOESY. All compounds were tested for anti-acetylcholinesterase using Thin Layer Chromatography (TLC)-bioautography with fast blue B salt. Only grandol A91) and B(2) showed positive results with clear discoloration until at the concentration of 12.5 ppm. However, the obtained IC50 for both grandol A and B when using Ellman's method, was not significant (>200ug/ml) compared to galanthamine (1.955 ug/ml) or huperzine A (0.082 ug/ml[1,2]
format Conference or Workshop Item
author Ismail, Intan Safinar
Low, K. W.
spellingShingle Ismail, Intan Safinar
Low, K. W.
Eight new triterpenoids isolated from dysoxylum grande (meliaceae) by various chromatographic techniques.
author_facet Ismail, Intan Safinar
Low, K. W.
author_sort Ismail, Intan Safinar
title Eight new triterpenoids isolated from dysoxylum grande (meliaceae) by various chromatographic techniques.
title_short Eight new triterpenoids isolated from dysoxylum grande (meliaceae) by various chromatographic techniques.
title_full Eight new triterpenoids isolated from dysoxylum grande (meliaceae) by various chromatographic techniques.
title_fullStr Eight new triterpenoids isolated from dysoxylum grande (meliaceae) by various chromatographic techniques.
title_full_unstemmed Eight new triterpenoids isolated from dysoxylum grande (meliaceae) by various chromatographic techniques.
title_sort eight new triterpenoids isolated from dysoxylum grande (meliaceae) by various chromatographic techniques.
publishDate 2012
url http://psasir.upm.edu.my/id/eprint/27331/1/ID%2027331.pdf
http://psasir.upm.edu.my/id/eprint/27331/
_version_ 1643829153145815040
score 13.211869

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