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Applications of Liquid-Chromatography Tandem Mass Spectrometry in Natural Products Research: Tropane Alkaloids as a Case Study
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TRAIL-enhancing activity of Erythrinan alkaloids from Erythrina velutina
Masaaki Ozawa1, Tadahiro Etoh, Masahiko Hayashi
1Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Kanda, Tokyo, Japan.
Abstract:
A new Erythrinan alkaloid (1), erythodine N-oxide, was isolated from the seeds of Erythrina velutina together with seven known Erythrinan alkaloids (2-7, 9) and an indole alkaloid (8). The structure of new compound (1) was elucidated by spectroscopic methods. Six of the nine compounds showed enhanced activity when combined with tumor necrosis factor-related apoptosis-inducing ligand (TRAIL). Erysotrine (4) did not show cytotoxic activity by itself, but exhibited significant cytotoxicity when combined with TRAIL.
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