abstract |
Abstract: 2,3,23-Trihydroxy-urs-12-ene and its derivatives, processes for their preparation and their use 2,3,23-Trihydroxy-urs-12-ene and its derivatives of the formula in which the substituents R1 - R5 have the given meaning can be used for the treatment and prophylaxis of cognitive disorders, cerebral vascular diseases and diseases of the central nervous system. |