Compound of formula I for treating a subject suffering from a muscle wasting disorder; for preventing a muscle wasting disorder in a subject; for treating, preventing, suppressing, inhibiting or reducing muscle loss in a subject suffering from a muscle wasting disorder; for treating, preventing, inhibiting, reducing or suppressing muscle wasting in a subject suffering from a muscle wasting disorder; and/or for treating, preventing, inhibiting, reducing or suppressing muscle protein catabolism in a subject suffering from a muscle wasting disorder.