Disclosed are compounds of Formula (I): [PLEASE INSERT CHEMICAL STRUCTURE HERE] or stereoisomers N oxides salts or prodrugs thereof wherein: Ring A is phenyl or 5 to 6 membered heteroaryl (i) R1 and R2 are independently C1 C4 alkyl or (ii) R1 and R2 together with the carbon atom to which they are attached form a cyclic group Q is phenyl or 5 to 6 membered heteroaryl substituted with zero to 3 substituents and R3 L1 L2 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.