Disclosed are compounds of Formula (I) or a pharmaceutically acceptable salt thereof, wherein: n is zero or an integer selected from 1 through 4; R1 is cycloalkyl, aryl, heteroaryl, or heterocyclyl, each optionally substituted with one to five substituents independently selected from C1 to C6 alkyl, C1 to C4 haloalkyl, benzyl, —OR4, and/or halogen; and R2, R3, R4, and n are defined herein. Also disclosed are methods of using such compounds as selective agonists for G protein-coupled receptor S1P1, and pharmaceutical compositions comprising such compounds. These compounds are useful in treating, preventing, or slowing the progression of diseases or disorders in a variety of therapeutic areas, such as autoimmune diseases and vascular disease.