New nonadjacent bis-THF ring acetogenins from the seeds of Annona squamosa

Two new annonaceous acetogenins named as squamostanin-C and squamostanin-D were isolated from 95% EtOH extract of the seeds of Annona squamosa. Their structures were determined by spectroscopic method, and their cytotoxicities were evaluated by using MTT method.

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