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Unprecedented 22,26-seco physalins from Physalis angulata and their anti-inflammatory potential
Cheng-Peng Sun1, Mahmood Brobbey Oppong, Feng Zhao
1Tianjin State Key Laboratory of Modern Chinese Medicine and School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, 312 Anshanxi Road, Nankai District, Tianjin 300193, China. fengqiu20070118@163.com.
Abstract:
Two novel physalins, including a 22,26-seco physalin, physalin X (1), and a 11,15-cyclo-9(10),14(17),22(26)-triseco physalin with an unprecedented aromatic ring, aromaphysalin B (2), were isolated from Physalis angulata L. Their structures were determined by IR, UV, HRESIMS, and 2D NMR spectra as well as theoretical calculations. Compounds 1 and 2 exhibited inhibitory activities on NO production with IC50 values of 68.50 and 29.69 μM, respectively. A plausible biosynthetic pathway for 2 is also discussed.
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