Cathayanalactone G and other constituents from leaves and twigs of Callicarpa cathayana
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Abstract:
Objective: To study the chemical constituents from the leaves and twigs of Callicarpa cathayana. Methods: The chemical constituents were isolated and purified by column chromatography on silica gel, MCI gel CHP 20P/P120, Sephadex LH-20, and HPLC. The structures of the compounds were determined by HR-ESI-MS, 1D and 2D NMR data. Results: A total of 24 compounds were isolated from the 85% methanol extract of leaves and twigs of C. cathayana. They were identified as cathayanalactone G (1), a new diterpene, and 23 known compounds as patagonic acid (2), (-)-16-hydroxycledroda-3,13-dien-16,15-olide-18-oic acid (3), 15-methoxypatagonic acid (4), oleanolic acid (5), ursolic acid (6), siaresinolic acid (7), pomolic acid (8), α-amyrin (9), tormentic acid (10), lupeol (11), 5,7-dihydroxy-3,4'-dimethoxyflavone (12), 5,4'-dihydroxy-3,7,3'-dimethoxyfla-vone (13), 5-hydroxy-3,6,7,4'- tetramethoxyflavone (14), salvigenin (15), kaemferol (16), astragalin (17), pinoresinol 4-O-β-D-glucopyranoside (18), paulownin (19), β-sitosterol (20), β-sitosterol β-D-glucopyranoside (21), 5-hydroxy-coumarin (22), isocopoletin (23), and 4-hydroxycinnamic acid (24). Conclusion: Compound 1 is a new labdane diterpene. Compounds 10, 13, 16 and 17 are isolated from the genus Callicarpa for the first time. Compounds 7, 8, 9, 12, 14, 23 and 24 are reported from C. cathayana for the first time.
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This work was financially supported by the Natural Science Foundation of China (No. 21762048, 81860615 and 81903541), Yunnan Applicative and Basic Research Program (No. 2018FY001), the grant of Yunnan Applicative and Basic Research Program (No. 2018FA048), the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT_17R94), and Project of Innovative Research Team of Yunnan Province (No. 202005AE160005), and Yun Ling Scholar Project to Wei-e Xiao.
Shuang Gong, Bin Cheng, Tiantian Sun, Xiaoli Li, Xinxin Liang, Yuan Wang, Xiaochang Dai, Weilie Xiao. Cathayanalactone G and other constituents from leaves and twigs of Callicarpa cathayana[J]. Chinese Herbal Medicines (CHM),2022,14(2):
