Ahr agonists

A compound of formula:

• wherein:
• ring A is a 5-membered or 6-membered carbocycle;
• ring B is a phenyl, or a 5-membered or 6-membered heteroaryl having 1 or 3 heteroatoms, wherein each heteroatom of the heteroaryl is independently selected from N, S, and O;
• R is H or C1-3 alkyl;
• X is H, halo, C1-3 alkyl optionally substituted with one or more halo, or a C1-3 alkoxyl;
• Y is H, C1-4 alkyl, or C3-4 cycloalkyl, wherein the C1-4 alkyl is a primary or secondary alkyl;
• and
• Z is CH or N,
• a stereoisomer or mixture of stereoisomers thereof, or a pharmaceutically acceptable salt of each thereof.