1 X37 4-(4-tert-butylbenzyl)-1-(7h-pyrrolo[2,3-D]pyrimidin-4-yl)piperidin-4-aminium 1.000 2 M05 4-(4-chlorobenzyl)-1-(7h-pyrrolo[2,3-D]pyrimidin-4-yl)piperidin-4-aminium 0.821 3 M04 1-[4-(4-chlorobenzyl)-1-(7h-pyrrolo[2,3-D]pyrimidin-4-yl)piperidin-4-yl]methanamine 0.733