Four New Amaryllidaceae Alkaloids from Galanthus Gracilis and Galanthus Plicatus subsp,Byzantinus

摘要

(+)-3-Epi-3,4-dihydro-3-hydroxygraciline (5),isolated from Galanthus gracilis of Turkish origin,is a new member of the gracilines,a recently established subgroup of the Amaryllidaceae alkaloids.G.plicatus subsp.byzantinus has furnished three new alkaloids,namely (+)-plicane (12),which is a enw plicamine-type alkaloid,along with (+)-3-O-(3-hydroxybutyryl)tazettinol (13),and N-formylismine (15).