GLYCOALKALOIDS OF SOLANUM-COMMERSONII DUN-EX-POIR

Five glycoalkaloids were identified from the aerial parts of wild Sola num commersonii Dun. ex Poir growing in Uruguay and their structures e lucidated mainly by chemical and spectroscopic methods. In addition to the already known commersonine, demissine, tomarine and dehydrocommer sonine, a new glycoalkaloid, identified as Delta(5)-demissine, a-D-Xyl p-(1-->3)]-beta-D-Glcp-(1-->4)-beta-D-Galp} was found. Tomatine and de hydrocommersonine have not been reported earlier as components of this plant. The glycoalkaloid composition found in the wild plants studied differ significatively from those described earlier, and have some im plications in taxonomy and its use in potato breeding.