Abstract
A new pyrrolidone peroxide, named cucubalactam (1), and a new octacyclopeptide, named brachystemin E (2), have been isolated from Caryophyllaceae plants, Cucubalus baccifer and Brachystemma calycinum, respectively. Their structures were determined by spectral methods, especially by 1D and 2D NMR techniques. The stereochemistry of compound (2) was demonstrated by X-Ray crystallograph.
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