New 2-arylbenzofuran metabolite from cell cultures of Morus alba

Naturally occurring prenylated stilbenoids: food sources, biosynthesis, applications and health benefits

Prenylated stilbenoids are a unique class of natural phenolic compounds consisting of C6-C2-C6 skeleton with prenyl substitution. They are potential nutraceuticals and dietary supplements presented in some edible plants. Prenylated stilbenoids demonstrate promising health benefits, including antioxidant, anti-cancer, anti-inflammatory, anti-microbial activities. This review reports the structure, bioactivity and potential application of prenylated stilbeniods in food industry. Edible sources of these compounds are compiled and summarized. Structure-activity relationship of prenylated stilbenoids are also highlighted. The biosynthesis strategies of prenylated stilbenoids are reviewed. The findings of these compounds as food preservative, nutraceuticals and food additive are discussed. This paper combines the up-to-date information and gives a full image of prenylated stilbenoids.

Morusalisins A-F, six new Diels-Alder type adducts, as potential PTP1B inhibitors from cell cultures of Morus alba

Six new Diels-Alder type adducts, morusalisins A-F (1-6), were isolated from Morus alba cell cultures. The structures of 1-6 were determined by extensive spectroscopic data analysis, including HRESIMS, NMR, and ECD experiments. Furthermore, compounds 1-6 exhibited potent protein tyrosine phosphatase 1B (PTP1B) inhibitory activity with IC₅₀ values ranging from 1.14 to 2.24 μM, making them promising as bioactive compounds for anti-diabetic drug discovery.

Morusalones A-D, Diels-Alder Adducts with 6/7/6/6/6/6 Hexacyclic Ring Systems as Potential PTP1B Inhibitors from Cell Cultures of Morus alba

Morusalones A-D (1-4), a new class of Diels-Alder adducts featuring unprecedented 6/7/6/6/6/6 hexacyclic core skeletons with a unique bridged cycloheptenone ring, were isolated from Morus alba cell cultures. The biosyntheses for 1-4 were proposed through an unusual Diels-Alder cycloaddition with quinostilbenes as dienophiles and prenyl 2-phenylbenzofuran as a diene to yield the typical methylhexene unit and a rare intramolecular nucleophilic addition to form the cycloheptenone ring. Compounds 1-4 exhibited protein tyrosine phosphatase 1B inhibitory activity.

Isolation of naturally occurring novel isoflavonoids: an update

This review covers the literature concerning the isolation and identification of new naturally occurring isoflavonoids from Leguminosae and non-Leguminous species between 2012–2017.