Affiliation:
1. Key Laboratory of Xinjiang Phytomedicine Resource and Utilization Ministry of Education School of Pharmacy Shihezi University Shihezi 832002 P. R. China
2. Experiment Center of Xinjiang Second Medical College Kelamayi 834000 P. R. China
3. School of Medicine Tarim University Alaer 843300 P. R. China
4. Department of Pharmacognosy School of Pharmacy Fudan University Shanghai 201203 P. R. China
Abstract
AbstractCynasibirolide A (1), one new humulanolide sesquiterpene, together with four known analogs, asteriscanolide (2), (1S,8S)‐8‐hydroxyhumula‐2Z,6E,9E‐trien‐1,12‐olide (3), (1S,7R)‐8‐oxohumula‐2Z,9E‐dien‐1,12‐olide (4), and (+)‐6,7,9,10‐tetrahydroasteriscunolide (5) were isolated from the roots and rhizomes of Cynanchum acutum subsp. sibiricum. Their structures and configurations were elucidated by spectroscopic methods, including 2D‐NMR techniques, and the structure of 1 was confirmed by single‐crystal X‐ray diffraction. All compounds were evaluated for their anti‐complementary activity in vitro, and compound 3 exhibited anti‐complement effect with CH50 value of 0.45 mM.
Funder
National Natural Science Foundation of China
Subject
Molecular Biology,Molecular Medicine,General Chemistry,Biochemistry,General Medicine,Bioengineering