Xiling Fan, Yangang Cao, Mengnan Zeng, Yingjie Ren, Xiaoke Zheng, Weisheng Feng
Six new compounds, (7 R ,8 S ,8' R )-balanophorone ( 1 ), (7' S ,8' R ,8 R )-yunnanensin A ( 2 ), (3 S )-thunberginol C ( 3 ), (8 R ,8' R )-maninsigin B ( 4 ), (7 S ,8 R )-4,7,8-dihydroxy-9,9-dimethyl-chroman ( 5 ), and 4-hydroxy-1-(4-hydroxy-3-methoxyphenyl)butan-1-one ( 6 ), along with eight known compounds ( 7 - 14 ), were isolated from the herbaceous stems of Ephedra intermedia Schrenket C. A. Meyer. Their structures were elucidated based on their spectroscopic (MS, NMR, IR, and UV) data, and their absolute configurations were determined by comparing their calculated and experimental electronic circular dichroic (ECD) spectra...
January 16, 2024: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry