The invention provides novel compounds having the general formula (I) or (II) wherein R1, R2, Y, W, A, X, m and n are as defined herein, compositions including the compounds and methods of using the compounds.本發明提供具有通式(I)或(II)之新穎化合物、包括該等化合物之組合物及使用該等化合物之方法: 其中R1、R2、Y、W、A、X、m及n如本文所定義。