Antifungal Indole Alkaloids from Winchia calophylla

Mei-Li Yang; Jia Chen; Meng Sun; Dong-Bo Zhang; Kun Gao

doi:10.1055/s-0042-102459

Planta Medica, Inhaltsverzeichnis

Planta Med 2016; 82(08): 712-716
DOI: 10.1055/s-0042-102459

Biological and Pharmacological Activity

Original Papers

Georg Thieme Verlag KG Stuttgart · New York

Antifungal Indole Alkaloids from Winchia calophylla

Autoren

Mei-Li Yang

¹State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, P. R. China
Jia Chen

²School of Biotechnology and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo, P. R. China
Meng Sun

¹State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, P. R. China
Dong-Bo Zhang

¹State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, P. R. China
Kun Gao

¹State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, P. R. China

²School of Biotechnology and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo, P. R. China

Abstract

Ten indole alkaloids (1–10) were obtained from an antifungal extract of Winchia calophylla, of which two (2 and 4) were new. N(4)-Methyl-10-hydroxyl-desacetylakuammilin (2) was an akuammiline-type indole alkaloid. N(1)-Methyl-echitaminic acid (4) was an unusual zwitterion with a basic vincorine-type skeleton. This is the first report of 10 in W. calophylla. The structures of all of the compounds were determined based on spectroscopic data, and their bioactivities were assessed. Compound 1 showed potent activity against the plant pathogenic fungi of Penicillium italicum and Fusarium oxysporum f.sp cubens with IC₅₀s of 10.4 and 11.5 µM, respectively, and 3 inhibited Rhizoctonia solani with an IC₅₀ of 11.7 µM. Compounds 2 and 4 showed weak cytotoxicity against the human leukemic cell line HL-60 in vitro with IC₅₀s of 51.4 and 75.3 µM, respectively. Compounds 1 and 2 displayed weak activity against acetylcholinesterase with IC₅₀s around 61.3 and 52.6 µM, respectively.

Key words

Winchia calophylla - Apocynaceae - indole alkaloids - antifungal activity

Volltext

Referenzen

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