Results 151 to 160 of about 545 (181)

New depsidones from Lobaria oregana

Phytochemistry, 1980
Abstract From the lichen, Lobaria oregana , two new minor metabolises, methylstictic acid ( 4 ) and cryptostictic acid ( 5 ) were isolated. The structures of 4 and 5 were elucidated by 1 H NMR and MS analysis.
Sachiko Shimada (née Miyoshi), Tamotsu Saitoh, Ushio Sankawa, Shoji Shibata   +3 more
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ψ-esters of depsidones with a lactole ring

Phytochemistry, 1987
Abstract The reaction of stictic, norstictic and salazinic acids with methanol, ethanol and tert-butanol has been investigated. 8′- O -Methylstictic acid is identical with methylstictic acid from Lobaria oregana . Ingolfdottir's vesuvianic acid from Stereocaulon vesuvianum and Handong's cetrariastrumin from Cetrariastrum nepalensis have been ...
Siegfried Huneck, Raffaele Tabacchi
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The Structure of the Lichen Depsidones Fulgidin and Isofulgidin

Australian Journal of Chemistry, 1990
The depsidone isofulgidin (1) (2,4,7-trichloro-3-hydroxy-8-methoxy-1,6-dimethyl-11H-dibenzo-[ b,el [1,4]dioxepin-11-one), has been isolated from the lichen Rinodina dissa together with atranorin and diploicin (3). lsofulgidin (1) has also been detected in the lichens Hafellia parastata and Fulgensia canariensis.
AA Birkbeck, MV Sargent, JA Elix
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Loxodin, a depsidone of lichens of Parmelia species

Phytochemistry, 1970
Abstract Loxodin isolated from Parmelia flavescentireagens Gyel. and some other lichens of Parmelia spp. was shown to be methyl norlobarate (I).
T. Komiya, S. Kurokawa
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Cytotoxic Prenylated Depsidones from Garcinia parvifolia

Journal of Natural Products, 2000
Leaf extracts of Garcinia parvifolia provided relatively high yields of four novel, cytotoxic prenylated depsidones. The structures were determined mainly by detailed NMR spectral analysis and X-ray crystallography.
Xu, Y.-J., Chiang, P.-Y., Lai, Y.-H., Vittal, J.J., Wu, X.-H., Tan, B.K.H., Imiyabir, Z., Goh, S.-H.   +7 more
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Depsidone synthesis. Part 15. New metabolites of the lichen Buellia canescens(Dicks.) De Not: novel phthalide catabolites of depsidones

Journal of the Chemical Society, Perkin Transactions 1, 1981
The isolation, from the lichen Buellia canescens(Dicks.) De Not., and structural determination of the new depsidones 2,7,9-trichloro-3-hydroxy-8-methoxy-1,6-dimethyldibenzo[b,e][1,4]dioxepin-11-one (dechlorodiploicin)(1) and its methyl ether dechloro-O-methyldiploicin (9), together with the novel phthalides 4-chloro-7-(3,5-dichloro-4,6-dimethoxy-2 ...
Tony Sala, Melvyn V. Sargent, John A. Elix   +2 more
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A theory of biogenesis of lichen depsides and depsidones

Proceedings of the Indian Academy of Sciences - Section A, 1944
Lichen depsides and depsidones are considered to arise from a common source (XIV) which originates from aldol condensation between a hexose and a biose and elimination of water. Oxidation and reduction lead to various modifications of this C8 unit and increase in the length of the sidechain arises from condensation with simple sugars and reduction ...
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Parmosidone K, a new meta-depsidone from the lichen Parmotrema tsavoense

Natural Product Research, 2022
Thi-Hoai-Thu Nguyen, Thanh-Trung Nguyen, Huu-Hung Nguyen   +2 more
exaly  

ChemInform Abstract: DEPSIDONE SYNTHESIS. PART 19. SOME β‐ORCINOL DEPSIDONES

Chemischer Informationsdienst, 1981
T. SALA, M. V. SARGENT
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depsidone, n.

2023
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