Abstract
The phytochemistry study of Hypericum longistylum afforded one new degraded lupane-type triterpenoid, triterhyper A (1), and seven known congeners (2–8). The structures of those natural products were identified by extensive spectroscopic techniques and single crystal diffraction tests. Notably, triterhyper A (1) possessing an unusual 28-nor-lupane skeleton. More significantly, compounds 1–3 exhibited potential inhibitory effects on murine splenocytes proliferation stimulated by anti-CD3/anti-CD28 monoclonal antibodies (mAbs) and lipopolysaccharide (LPS), with IC50 values ranging from (4.56 ± 0.45) μM to (18.34 ± 2.34) μM, highlighting that those isolates as potential lead compounds in the development of immunosuppressive drugs for autoimmune disease treatment.
Graphical Abstract
Acknowledgements
We thank the Analytical and Testing Center at Huazhong University of Science and Technology for the acquisition of spectroscopic data.
Disclosure statement
The authors of the present manuscript have declared that no competing interests exist.