Journal of natural medicines · 2023
Antimalarial ceramicines Q-T from Chisocheton ceramicus.
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Nugroho Alfarius Eko, Wong Chin Piow, Hirasawa Yusuke, Kaneda Toshio, Tougan Takahiro, Horii Toshihiro, Hadi A Hamid A, Morita Hiroshi
Аннотация
Ceramicines are a series of limonoids that were isolated from the bark of Malaysian Chisocheton ceramicus (Meliaceae) and were known to show various biological activity. Four new limonoids, ceramicines Q-T (1-4) were isolated from the barks of C. ceramicus, and their structures were determined on the basis of the 1D and 2D NMR analyses in combination with calculated 13C chemical shift data. Ceramicines Q-T (1-4) were established to be new limonoids with a cyclopentanone[α]phenanthren ring system with a β-furyl ring at C-17, and without a tetrahydrofuran ring like ceramicine B, which is characteristic of known ceramicines. Ceramicine R (2) exhibited potent antimalarial activity against Plasmodium falciparum 3D7 strain with IC50 value of 2.8 µM.