Two new rotenoid glycosides from the rhizomes of Hook. f.

Two new rotenoid glycosides named stemonal 11---D-glucopyranoside and 6--methylstemonal 11---D-glucopyranoside together with ten known metabolites were isolated from the rhizomes of . The chemical structures of the new compounds were elucidated based on the analysis of their 1D and 2D NMR and HRESIMS, while the sugar unit and absolute configuration were determined by chemical hydrolysis and ECD analysis. Among the tested compounds for anti-α-glucosidase assay, stemonal showed an inhibitory effect (IC = 38.

Biocompatible film sensors containing red radish extract for meat spoilage observation.

pH-sensitive films were developed based on biocompatible materials and natural pH sensitive dye. The films were successfully fabricated using starch/gelatin and red radish anthocyanin. The colors of films could be differentiated by naked eye within 5 min changing from orange to grey-purple at pH 2-12 and captured by a smartphone.