13-Hydroxylupanine is a natural product from Cytisus scoparius.

The patterns of quinolizidine alkaloids in cell cultures of 10 species of Fabaceae were analyzed by high-resolution GLC and GLC-MS and compared with the alkaloids present in the leaves of the respective plants. METHODS AND RESULTS: Lupanine was produced in all 10 cell suspension cultures as the main alkaloid. It was accompanied by sparteine, tetrahydrorhombifoline, 17-oxosparteine, 13-Hydroxylupanine, 4-hydroxylupanine, 17-oxolupanine, and 13-Hydroxylupanine esters as minor alkaloids in some species. The alkaloid patterns of the plants differed markedly in that alpha-pyridone alkaloids were the major alkaloids in the genera Cytisus, Genista, Laburnum and Sophora but were not accumulated in the cell cultures. CONCLUSIONS:These data further support the assumption that the pathway leading to lupanine is the basic pathway of quinolizidine alkaloids biosynthesis and that the other alkaloids are derived from lupanine.