1-[(2E,4E)-1-Oxo-2,4-icosadienyl]pyrrolidine

This pyrrolidine base is found in Piper trichostachyon and forms colourless crystals from light petroleum. The ultraviolet spectrum in ethanol has a single absorption maximum occurring at 261 Mu. The structure has been shown, by chemical degradation, to be N-eicosa-2:4-dienoylpyrrolidine.

Singh, Dhar, Atal., Tetrahedron Lett., 2119 (1971)