The invention provides a compound of formula (I): wherein W is a bicyclic heteroaromatic group; or a salt thereof. The compounds and salts thereof have beneficial therapeutic properties (e.g. immunosuppressant properties).
The invention provides a compound of formula (I): wherein R1, and W have any of the values defined in the application; or a salt thereof. The compounds and salts thereof have beneficial therapeutic properties (e.g. immunosuppressant properties).