Ramalin, a Novel Phenyl Hydrazide from the Lichen Ramalina Terebrata; Isolation, Total Synthesis and Biological Activities
Ramalin, a new L-glutamic acid derivative of phenylhydrazide (Y-glutamyl-N'-(2-hydroxyphenyl) hydrazide, 1) was isolated from the Antarctic lichen, Ramalina terebrata after a series of bioactivity guided fractionation of crude aqueous methanolic extract. Ramalin showed stronger antioxidant acti...
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Centre for Research Tribhuvan University, Kirtipur, Kathmandu, Nepal
2016
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ftjnepaljo:oai:nepjol:article/25544 2023-05-15T14:00:22+02:00 Ramalin, a Novel Phenyl Hydrazide from the Lichen Ramalina Terebrata; Isolation, Total Synthesis and Biological Activities pandey, Durga Prasad Bhattarai, Hari Datta English literature 2016-12-01 application/pdf https://www.nepjol.info/index.php/TUJ/article/view/25544 https://doi.org/10.3126/tuj.v30i2.25544 eng eng Centre for Research Tribhuvan University, Kirtipur, Kathmandu, Nepal https://www.nepjol.info/index.php/TUJ/article/view/25544/21344 https://www.nepjol.info/index.php/TUJ/article/view/25544 doi:10.3126/tuj.v30i2.25544 Copyright (c) 2016 Center for Research, Tribhuvan University Tribhuvan University Journal; Vol 30 No 2 (2016); 35-42 2091-0916 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2016 ftjnepaljo https://doi.org/10.3126/tuj.v30i2.25544 2020-11-29T18:56:29Z Ramalin, a new L-glutamic acid derivative of phenylhydrazide (Y-glutamyl-N'-(2-hydroxyphenyl) hydrazide, 1) was isolated from the Antarctic lichen, Ramalina terebrata after a series of bioactivity guided fractionation of crude aqueous methanolic extract. Ramalin showed stronger antioxidant activities than commercially available standards, ascorbic acid, trolox, BHA, kojic acid in both, in vitro and in vivo test systems. In addition, ramalin showed no/less toxicity effects against two human cell lines; fibroblast (CCD-986SK) cells and keratinocyte (HaCaT). Thus, realign merits for cosmetic application and industrial scale production were needed. We developed a cost effective total synthesis of ramalin with 71.5% yield and described here. Article in Journal/Newspaper Antarc* Antarctic Nepal Journals Online (NepJOL) Antarctic The Antarctic Tribhuvan University Journal 30 2 35 42 |
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Open Polar |
collection |
Nepal Journals Online (NepJOL) |
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ftjnepaljo |
language |
English |
description |
Ramalin, a new L-glutamic acid derivative of phenylhydrazide (Y-glutamyl-N'-(2-hydroxyphenyl) hydrazide, 1) was isolated from the Antarctic lichen, Ramalina terebrata after a series of bioactivity guided fractionation of crude aqueous methanolic extract. Ramalin showed stronger antioxidant activities than commercially available standards, ascorbic acid, trolox, BHA, kojic acid in both, in vitro and in vivo test systems. In addition, ramalin showed no/less toxicity effects against two human cell lines; fibroblast (CCD-986SK) cells and keratinocyte (HaCaT). Thus, realign merits for cosmetic application and industrial scale production were needed. We developed a cost effective total synthesis of ramalin with 71.5% yield and described here. |
format |
Article in Journal/Newspaper |
author |
pandey, Durga Prasad Bhattarai, Hari Datta |
spellingShingle |
pandey, Durga Prasad Bhattarai, Hari Datta Ramalin, a Novel Phenyl Hydrazide from the Lichen Ramalina Terebrata; Isolation, Total Synthesis and Biological Activities |
author_facet |
pandey, Durga Prasad Bhattarai, Hari Datta |
author_sort |
pandey, Durga Prasad |
title |
Ramalin, a Novel Phenyl Hydrazide from the Lichen Ramalina Terebrata; Isolation, Total Synthesis and Biological Activities |
title_short |
Ramalin, a Novel Phenyl Hydrazide from the Lichen Ramalina Terebrata; Isolation, Total Synthesis and Biological Activities |
title_full |
Ramalin, a Novel Phenyl Hydrazide from the Lichen Ramalina Terebrata; Isolation, Total Synthesis and Biological Activities |
title_fullStr |
Ramalin, a Novel Phenyl Hydrazide from the Lichen Ramalina Terebrata; Isolation, Total Synthesis and Biological Activities |
title_full_unstemmed |
Ramalin, a Novel Phenyl Hydrazide from the Lichen Ramalina Terebrata; Isolation, Total Synthesis and Biological Activities |
title_sort |
ramalin, a novel phenyl hydrazide from the lichen ramalina terebrata; isolation, total synthesis and biological activities |
publisher |
Centre for Research Tribhuvan University, Kirtipur, Kathmandu, Nepal |
publishDate |
2016 |
url |
https://www.nepjol.info/index.php/TUJ/article/view/25544 https://doi.org/10.3126/tuj.v30i2.25544 |
op_coverage |
English literature |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Tribhuvan University Journal; Vol 30 No 2 (2016); 35-42 2091-0916 |
op_relation |
https://www.nepjol.info/index.php/TUJ/article/view/25544/21344 https://www.nepjol.info/index.php/TUJ/article/view/25544 doi:10.3126/tuj.v30i2.25544 |
op_rights |
Copyright (c) 2016 Center for Research, Tribhuvan University |
op_doi |
https://doi.org/10.3126/tuj.v30i2.25544 |
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Tribhuvan University Journal |
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30 |
container_issue |
2 |
container_start_page |
35 |
op_container_end_page |
42 |
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1766269428724400128 |