Wen-Cai Ye

TL;DR: In this paper, the chemical analysis of ASB injection resulted in the isolation of four new related impurities (2, 3, 5, 6), together with two known compounds (1, 4) and two unprecedented photocyclization derivatives of isocopalane diterpene.

TL;DR: A new phenylpropanoid and a new isoflavone glycoside were isolated from Shenqi Fuzheng Injection and their structures were elucidated by means of spectroscopic methods including UV, IR, HR-ESI-MS, and NMR.

TL;DR: Three pairs of Securinega alkaloid epimers with a piperidin-2-yl moiety were isolated from Flueggea suffruticosa and an unusual stereochemical inversion mechanism of an N-substituted carbon stereogenic center was demonstrated.

TL;DR: In this paper, three new biflavonoids, umcephabiovins C'-'E (1' -'3', along with fourteen known compounds were isolated from the twigs and leaves of Cephalotaxus oliveri and elucidated by UV, IR, NMR, ECD, and HR-ESI-MS spectra.

TL;DR: In this article , eight 2,6-disubstituted piperidin-3-ol alkaloids (1-8), featuring a C10 unsaturated alkyl side chain, together with three previously reported analogues (9-11) were isolated from the leaves of medicinal plant Microcos paniculata, and their structures and absolute configurations were elucidated unambiguously by means of 1D and 2D NMR spectroscopic data analysis.