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Nine new monomacrolide sesquiterpene pyridine alkaloids, macroregelines A–I (1–9), were isolated from the stems of Tripterygium regelii, along with a known alkaloid, tripfordine B. The structures of all the isolated compounds were characterized by extensive one-dimensional (1D) and two-dimensional (2D) nuclear magnetic resonance (NMR) spectroscopic analyses, as well as high-resolution electrospray-ionization...
Twelve new dihydro-β-agarofuran polyesters, triptregelines A–J (1–3 and 5–11) and triptregelols A, B (4, 12), together with five known ones (13–17) were isolated from the stems of Tripterygium regelii. The structures were determined on the basis of extensive analysis of spectroscopic data (1D, 2D NMR, and UV etc.) and HRMS data. Cytotoxic effects of these compounds were evaluated against a pair of...
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