1. The X-ray crystal structure of (±)-flavipucine
2. W.Southon and J.Buckingham eds, Dictionary of Alkaloids, First Edition, Chapman and Hall, London and New York, 1989; No. R-00072, p 923.
3. The Merck Index, 12th Edition, Merck & Co., Inc, Rahway, NJ, 1996, No. 8377, p 1412.
4. see ref [2], No. B-00056, p 135;