The invention provides compounds having the general formula I:
and pharmaceutically acceptable salts thereof, wherein the variables R
A
, R
AA
, subscript n, ring A, X
2
, L, subscript m, X
1
, R
1
, R
2
, R
3
, R
4
, R
5
, and R
N
have the meaning as described herein, and compositions containing such compounds and methods for using such compounds and compactions.
The instant invention describes methods for treating diseases and conditions of the central and peripheral nervous system by stimulating or increasing neurogenesis. The invention includes compositions and methods based on modulating angiotensin activity to stimulate or activate the formation of new nerve cells.