Tricyclic compounds, compositions, and methods useful in the treatment or prophylaxis of 5-HT6 receptor-related disorders

摘要

The present invention relates to compounds of the formula (I) wherein A, X and R1 to R9 are as described herein; to pharmaceutical compositions comprising the said compounds; to processes for their preparation; and to the use of the compounds as medicaments against 5-HT6 receptor-related disorders.