Abstract
Rutacridone, 1-hydroxy-N-methylacridone, and 1-hydroxy-3-methoxy-N-methylacridone have been isolated for the first time from callus cultures, which had been obtained from meristematic stem cells of Ruta graveolens L. The alkaloids were identified by co-chromatography with authentic compounds, by IR spectra, and by electronic spectra before and after addition of AlCl3. The use of the bathochromic shift by the AlCl3-complex in the analysis of acridine-alkaloids has been demonstrated for the first time.