TETRAHYDRONAPHTHYRIDINES AND AZA DERIVATIVES THEREOF AS HISTAMINE H3 RECEPTOR ANTAGONISTS

摘要

The invention relates to compounds of formula (I), wherein X1a, X1 to X5, Ra, Rb, n and R have the meaning as cited in the description and the claims. Said compounds are useful as Histamine H3 receptor antagonists. The invention also relates to pharmaceutical compositions, the preparation of such compounds as well as the production and use as medicament.