Abstract
Four new alkaloids (1-4) and one known alkaloid were isolated from the stems of Picrasma quassioides. The structures of these isolated compounds were elucidated by spectroscopic analyses, a combination of computer-assisted structure elucidation software (ACD/Structure Elucidator) and gauge-including atomic orbital (GIAO) calculation of 1 D NMR data. All compounds were evaluated for their cytotoxic activities against hepatocellular carcinoma HepG2 and Hep3B cells. However, they did not show obvious inhibitory activities.
Graphical Abstract
![](/cms/asset/290cca80-957e-4d73-8f22-042417668695/ganp_a_1729135_uf0001_c.jpg)
Acknowledgments
We kindly thank Miss Wen Li, Mr Chao Huang, Miss Li-Li Lou of Shenyang Pharmaceutical University for recording the NMR spectra.
Disclosure statement
No potential conflict of interest was reported by the author(s).