Three new tazettine-type alkaloids from Galanthus gracilis and Galanthus plicatus subsp. byzantinus

Three new tazettine-type alkaloids were isolated from two different Galanthus species of Turkish origin. (+)-Isotazettinol and (+)-3-O- demethylmacronine are obtained from G. gracilis, while (+)-3-O-demethyl-3- epimacronine is found in G. plicatus subsp. byzantinus. The known base, trispheridine, is reported for the first time in Galanthus genus.