4.8 Article

Icacinlactone H and Icacintrichantholide from the Tuber of Icacina trichantha

Journal

ORGANIC LETTERS
Volume 17, Issue 15, Pages 3834-3837

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.5b01806

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Funding

  1. Institute of International Education of the United States, Department of State's Bureau for Education and Cultural Affairs [15120356]

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The 17-norpimarane diterpene is a small group of natural products. A new member, icacinlactone H (1), and a new rearranged 17-norpimarane with an unprecedented carbon skeleton, icacintrichantholide (2), were isolated from Icacina trichantha. Their structures including the absolute configuration were elucidated by spectroscopic analysis, single-crystal X-ray diffraction, and electronic circular dichroism analysis. A plausible biogenetic pathway for 1 and 2 is proposed. Both 1 and 2 showed no significant activity against herpes simplex viruses HSV-1 and HSV-2 as well as the EpsteinBarr virus at 50 mu M.

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