Cassipoureamide-A and -B: new sulfur-containing amides from stem wood of Cassipourea guianensis.


New sulfur-containing amides, cassipoureamide-A (1) and -B (2), have been isolated from the stem wood of Cassipourea guianensis, and their structures were determined to be cis-N-(2-hydroxyethyl)-4-hydroxy-1,2-dithiolane-3-carboxamide and cis-N-(2-hydroxyethyl)-5-hydroxy-1,2,3-trithiane-4-carboxamide, respectively, by MS and NMR studies. 


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