The present invention provides a compound of the formula: Formula (I) or a pharmaceutically acceptable salt thereof； pharmaceutical compositions comprising a compound of Formula (I) in combination with a suitable carrier, diluent, or excipient； and methods for treating physiological disorders, particularly reduced bones mass, osteoporosis, osteopenia, or reduced muscle mass or strength, comprising administering a compound of Formula (I), or a pharmaceutically acceptable salt thereof. X-17142.
