Casuariin, stachyurin and strictinin, new ellagitannins from Casuarina stricta and Stachyurus praecox.

Abstract

Three new ellagitannins, casuariin (5), stachyurin (6) and strictinin (7) have been isolated from Casuarina stricta, and their structures elucidated. Of these, 5 and 6 were found to be C-glucosidic tannins. All of the ellagitannins (1-7) isolated from C. stricta have been found also in Stachyurus praecox.