The invention provides novel compounds having the general formula (I)wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12 and A are as described herein, compositions-including the compounds and methods of using the compounds.本發明提供具有通式(I)之新穎化合物其中R1、R2、R3、R4、R5、R6、R7、R8、R9、R10、R11、R12及A係如本文所述,包括該等化合物之組合物及使用該等化合物之方法。