Isolation and Structure Elucidation of a Novel Alkaloid, Incartine, a Supposed Biosynthetic Intermediate, from Flowers of Lycoris incarnata.

Abstract

A novel alkaloid incartine (1), a supposed biosynthetic intermediate from galanthine (2) to narcissidine (3), was isolated from flowers of Lycoris incarnata (Amaryllidaceae) together with the known alkaloids galanthine (2), ungiminorine (4), ungiminorine N-oxide (5), galanthamide (6), galanthamine N-oxide (7), lycoramine (8), sanguinine (9), lycorine (10), and O-demethyllycoramine (11). 1-Palmitoyl-2-linoleoylphosphatidylethanolamine (12) and 1-palmitoyl-2-linoleoyphosphatidylmethanol sodium salt (13) were also identified in the flower.