Two new cyclic peptides, named as cyclogeobomptides A (1) and B (2) were isolated from the roots of Stachys geobombycis C. Y. Wu. Compounds 1 and 2 are both made up of eight amino acids. The structures of them were established on the basis of the spectral data, including mass spectrometry, 2D NMR, and X-ray crystallography.Cyclogeobomptides A and B were proved to have obvious inhibitory activities against αglucosidase with the IC50 values of 26.00 and 19.16 μM, respectively.
A new compound, 2-hydroxy-4-[3',5'-dihydroxyhexyl]phenyl-β-D-glucopy-ranoside (1), together with five known compounds (2-6), were isolated from the leaves of microsorium fortunei. Their structures were determined by spectroscopic techniques, especially 2D NMR and MS data analyses. All of these compounds are phenolic glycosides and were isolated from this plant for the first time. In addition, compound 1 showed moderate inhibitory activity against a-glucosidase with IC 50 value at 0.111±0.061 mg/mL
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.