Two indolotryptanthrin alkaloids from Cephalantheropsis gracilis.

[摘要]：Two alkaloids of indolotryptanthrins, cephathrindole A (1) and B (2), were isolated from Cephalantheropsis gracilis. The structure of cephathrindole A was confirmed by X-ray crystallog. whereas cephathrindole B was ascertained by spectroscopic anal. (1D 1H- and 13C-NMR as well as 2D COSY, HMQC, HMBC, and NOESY).

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