Novel compounds are disclosed that have a Formula represented by the following:wherein X, R1, R2a, R2b, R2c, R3aR3b, R4a, R4b, R4c, and ml are as described herein. The compounds may be prepared as pharmaceutical compositions, and may be used for the prevention and treatment of a variety of conditions in mammals including humans, including by way of non-limiting example, cachexia, osteoporosis, sarcopenia, a decline in libido and/or sexual dysfunction.本發明揭示下式代表之新穎化合物:其中X、R1、R2a、R2b、R2c、R3a、R3b、R4a、R4b、R4c及m1係如本文所述。該等化合物可製備為醫藥組合物,且可用於預防及治療包括人類之哺乳動物的各種病況,非限制性實例包括惡質病(cachexia)、骨質疏鬆症、肌肉減少症、性欲衰退及/或性功能障礙。