Abstract
The ethanolic extract of the fresh flowers of Pancratium maritimum L. yielded a new alkaloid ester pancritamine (1), together with the alkaloids acetyllycoramine (2), (-)-N-demethyllycoramine (3) and crinine (4). Additionally, two nitrogenous bases, thymine (5) and uracil (6) were isolated and identified. The structure and stereochemistry of pancritamine have been determined by spectroscopic analyses and by application of 2D-NMR techniques as well as CD study. The H-1 and/or C-13 NMR spectra of acetyllycoramine and (-)-N-demethyllycoramine have now been completely characterized and revised.