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Molecules 2017, 22(10), 1675; doi:10.3390/molecules22101675

Gypmacrophin A, a Rare Pentacyclic Sesterterpenoid, Together with Three Depsides, Functioned as New Chemical Evidence for Gypsoplaca macrophylla (Zahlbr.) Timdal Identification

1
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
2
Kunming College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100039, China
3
Key Laboratory for Plant Biodiversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
*
Authors to whom correspondence should be addressed.
Received: 18 September 2017 / Revised: 30 September 2017 / Accepted: 3 October 2017 / Published: 9 October 2017
(This article belongs to the Special Issue Diversity of Terpenoids)
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Abstract

The phytochemical investigation on 1 g of materials from Gypsoplaca macrophylla (Zahlbr.) Timdal resulted in the discovery of gypmacrophin A, a rare pentacyclic sesterterpenoid; brialmontin III, a new polysubstituted depside and two known ones, brialmontins I and II. The structure and absolute configurations of gypmacrophin A were elucidated by spectroscopic analyses and computational methods. Gypmacrophin A showed weak inhibition of AchE with an IC50 value of 32.03 μM. The four compounds provided new chemical evidence for G. macrophylla identification. View Full-Text
Keywords: Gypsoplacaceae; Gypsoplaca macrophylla; Sesterterpenoid; Identification Gypsoplacaceae; Gypsoplaca macrophylla; Sesterterpenoid; Identification
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhou, Y.-F.; Shi, H.-X.; Hu, K.; Tang, J.-W.; Li, X.-R.; Du, X.; Sun, H.-D.; Wang, L.-S.; Pu, J.-X. Gypmacrophin A, a Rare Pentacyclic Sesterterpenoid, Together with Three Depsides, Functioned as New Chemical Evidence for Gypsoplaca macrophylla (Zahlbr.) Timdal Identification. Molecules 2017, 22, 1675.

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