The present invention is directed to Benzomorphan Analog compounds of the Formula I’, Formula IA’, Formula IB’, Formula IC’, or Formula ID’ as shown below, wherein R1, R2a, R2b, R3, R4, Z, and G are as defined herein. Compounds of the Invention are useful for treating pain, constipation, and other conditions modulated by activity of opioid and ORL-1 receptors.本發明係關於如下所示的式I’、式IA’、式IB’、式IC’、或式ID’之苯並嗎凡類似物化合物，其中R1、R2a、R2b、R3、R4、Z、及G如本文所界定者。本發明(所有)化合物可用於治療疼痛、便秘、以及其他藉由類鴉片及ORL-1受體的活性所調節的病況。
