Jiangong Shi

TL;DR: Twenty-two new lignans and neolignans (1-22), together with 14 known analogues, have been isolated from an ethanolic extract of the stem (with skin removed) of Sinocalamus affinis by spectroscopic and chemical methods.

TL;DR: Three unique pyrano-1,6-dione derivatives and a new furo[3,2-c]pyran-4-one, named phelligridins C-F (2-5), together with hispolon (8), (E)-4-(3,4-dihydroxyphenyl)but-3-en-2-one (9), 4-hydroxybenzaldehyde, protocatechualdehyde,

TL;DR: In the in vitro assays, compound 4 and liriodendrin both showed activity against glutamate-induced PC12 cell damage at 10 (-5) M M, and the validity of J 7,8 and Deltadelta C8-C7 values to distinguish threo and erythro derivatives was discussed.

TL;DR: Seventeen new alkaloids and 14 known analogues have been isolated from an aqueous extract of the root of Isatis indigotica by extensive spectroscopic data analysis, including 2D NMR, single-crystal X-ray crystallography using anomalous scattering of Cu Kα radiation, and electronic circular dichroism spectra calculations based on the quantum-mechanical time-dependent density functional theory.

TL;DR: Further chemical investigation of the Chinese medicinal fungus Phellinus igniarius has resulted in the isolation and structural elucidation of three pyrano[4,3-c]isochromen-4-one derivatives, phelligridins H, I, and J, together with the known compounds davallialactone and scopolin.