(-)-(trans-4'-β-D-Glucopyranosyloxycinnamoyl) lupinine, a New Lupin Alkaloid in Lupinus Seedlings

Abstract

A new glucosidic lupin-alkaloid, (-)-(trans-4'-β-D-glucopyranosyloxycinnamoyl)-lupinine (5), was newly isolated from the fresh seedings of Lupinus luteus. Its structure has been confirmed by direct comparison with a synthetic material. The concentration of 5 in the immature and mature seeds of L. luteus was negligibly low, but its concentration increased rapidly during the first 3-10 day's growth of seedlings and became a minor component again in the later stages of the plant's growth.