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Your search keyword '"Spectrum analysis"' showing total 2 results
2 results on '"Spectrum analysis"'

1. Tyrokeradines G and H, new bromotyrosine alkaloids from an Okinawan Verongid sponge.

Author

Kubota, Takaaki, Watase, Shinya, Sakai, Kanae, Fromont, Jane, Gonoi, Tohru, and Kobayashi, Jun’ichi

Subjects
*SPONGES (Invertebrates), *TYROSINE, *ALKALOIDS, *ANTIFUNGAL agents, *ALANINE, *SPECTRUM analysis
Abstract

Two new bromotyrosine alkaloids, tyrokeradines G ( 1 ) and H ( 2 ), have been isolated from an Okinawan marine sponge of the order Verongida. The structures of 1 and 2 were elucidated on the basis of spectroscopic data. Tyrokeradine G ( 1 ) is the first bromotyrosine alkaloid possessing a β-alanine unit, while tyrokeradine H ( 2 ) is a rare bromotyrosine alkaloid possessing a N -substituted pyridinium ring. Tyrokeradines G ( 1 ) and H ( 2 ) showed antifungal activity. [ABSTRACT FROM AUTHOR]

Published
2015
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2. Agelamadins A and B, Dimeric Bromopyrrole Alkaloidsfrom a Marine Sponge Agelassp.

Author

Kusama, Taishi, Tanaka, Naonobu, Sakai, Kanae, Gonoi, Tohru, Fromont, Jane, Kashiwada, Yoshiki, and Kobayashi, Jun’ichi

Subjects
*PYRROLES, *ALKALOIDS, *SPONGES (Invertebrates), *MOIETIES (Chemistry), *ANTI-infective agents, *SPECTRUM analysis
Abstract

Twostructurally unique dimeric bromopyrrole alkaloids, agelamadinsA (1) and B (2), were isolated from a marinesponge Agelassp. Agelamadins A (1)and B (2) have a structure consisting of an agelastatin-liketetracyclic moiety and an oroidin-like linear moiety in common. Thestructures of 1and 2were elucidated onthe basis of spectroscopic analysis. The antimicrobial activity andcytotoxicity of agelamadins A (1) and B (2) were evaluated. [ABSTRACT FROM AUTHOR]

Published
2014
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