主权项 |
1. A compound of Formula wherein: A is CH or N; n is 1 or 2;
R1 is lower alkyl, cycloalkyl, phenyl, or heterocycloalkyl; R2 is —C(═O)OR2′, —C(═O)N(R2′)2, monocyclic or bicyclic heteroaryl, optionally substituted with one or more R2′;
each R2′ is independently H, lower alkyl or heterocycloalkyl; R3 is H or lower alkyl; R4 is hydroxyl or amino; and X is CH2 or C(═O); or a pharmaceutically acceptable salt thereof. |