The invention provides novel compounds having the general formula (I) or (II)wherein R2, R3, R5, R99, W, Y and Z are as described 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:其中R2、R3、R5、R99、W、Y及Z係如本文所描述,以及包括該等化合物之組合物及使用該等化合物之方法。