Paul Pui-Hay But

TL;DR: The whole plant of Elephantopus scaber afforded the known deoxyelephantopin and isodeoxy-elephantopsin and a new germacranolide sesquiterpene lactone named scabertopin, whose structure and stereo-chemistry were determined by spectroscopic methods and single-crystal X-ray analysis as mentioned in this paper.

TL;DR: Broad-based phytochemical investigations on 31 Stemona species and geographical provenances led to an overview concerning characteristic accumulation trends and the distribution of different StEMona alkaloids, and two major metabolic differences suggested a taxonomic segregation of the complex Stemonia tuberosa group from the other species.

TL;DR: An examination of the roots of Murraya for the presence of the dimeric indole yuehchukene has revealed a dichotomy in the genus between species producing this alkaloid and those producing the carbazole alkaloids girinimbine, with no apparent overlap between the two groups of species.

TL;DR: Results suggest that tannins may be responsible for the vasorelaxant and hypotensive effects of Geum japonicum, mediated via endogenous NO and subsequent cGMP formation.

TL;DR: Two marker compounds were identified exclusively in H. diffusa: 6-O-(E)-p-coumaroyl scandoside methyl ester and 10(S)-hydroxypheophytin a (compound 2), which showed moderate anti-proliferation effect on PC3 human androgen-independent prostate cancer cells, while compound 2 also showed strong anti- Prostate cancer cells effect.