Sun Xing-Yan, Ma Jie, Li Chuang-Jun, Zang Ying-Da, Tian Jin-Ying, Li Li, Li Yu-Huan, Ye Fei, Zhang Dong-Ming
State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China.
Beijing Key Laboratory of Anti-infective Agents, Institute of Medical Biotechnology, Chinese Academy of Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China.
Bioorg Chem. 2023 May;134:106458. doi: 10.1016/j.bioorg.2023.106458. Epub 2023 Mar 15.
Six new oligostilbenes, carastilphenols A-E (1-5) and (-)-hopeachinol B (6), with three reported oligostilbenes were obtained from the stems of Caragana sinica. The structures of compounds 1-6 were determined by comprehensive spectroscopy analysis, and their absolute configurations were determined by electronic circular dichroism calculations. Thus, natural tetrastilbenes were determined as absolute configuration for the first time. Also, we did several pharmacological essays. In the antiviral tests, compounds 2, 4 and 6 showed moderate anti-coxsackie virus B3 type (CVB3) effect on Vero cells activities in vitro with IC values of 19.2 ∼ 69.3 μM; and compounds 3 and 4 showed different levels of anti-respiratory syncytial virus (RSV) effect on Hep2 cells activities in vitro with IC values of 23.1 and 33.3 μM, respectively. As for hypoglycemic activity, compounds 6-9 (10 μM) showed the inhibition of α-glucosidase in vitro with IC values of 0.1 ∼ 0.4 μM; and compound 7 showed significant inhibition (88.8%, 10 μM) of protein tyrosine phosphatase 1B (PTP1B) with IC value of 1.1 μM in vitro.
