Issue 7, 2015

Hyperattenins A–I, bioactive polyprenylated acylphloroglucinols from Hypericum attenuatum Choisy

Abstract

Nine new polyprenylated acylphloroglucinols (PPAPs), hyperattenins A–I (1–9), together with thirteen known analogues (10–22), were isolated from the aerial parts of Hypericum attenuatum Choisy. The structures of 1–9 were elucidated by extensive spectroscopic analysis. The absolute configuration of 1 was determined by a single X-ray crystallographic analysis, and the absolute configurations of 2–9 were determined by comparison of experimental and calculated electronic circular dichroism (ECD) spectra. Compound 1 was characterised as a bicyclo[3.3.1]nonane derivative containing an unusual hemiacetal functionality formed by a series of redox reactions on its side chains, which occurs rarely in nature. All new isolates were evaluated for cytotoxic activities against several human cancer cell lines. Compound 9 exhibited significant inhibitory activity against the HL-60 and A-549 cell lines, with IC50 values of 2.04 and 3.26 μM, respectively. Compound 9 also showed low toxicity to Beas-2B cells (IC50 = 14.36 μM), suggesting that it could be a selective anti-tumour agent for leukaemia and lung cancer. Compounds 2–8 were also screened for their anti-HIV-1 activities.

Graphical abstract: Hyperattenins A–I, bioactive polyprenylated acylphloroglucinols from Hypericum attenuatum Choisy

Supplementary files

Article information

Article type
Paper
Submitted
02 oct. 2014
Accepted
11 dic. 2014
First published
12 dic. 2014

RSC Adv., 2015,5, 5277-5287

Author version available

Hyperattenins A–I, bioactive polyprenylated acylphloroglucinols from Hypericum attenuatum Choisy

D. Li, Y. Xue, H. Zhu, Y. Li, B. Sun, J. Liu, G. Yao, J. Zhang, G. Du and Y. Zhang, RSC Adv., 2015, 5, 5277 DOI: 10.1039/C4RA11675E

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