1 F1L N-[1-(5-bromo-2,3-dimethoxybenzyl)piperidin-4-yl]-4-sulfanylbutanamide 1.000 2 F1I N-[1-(2,6-dimethoxybenzyl)piperidin-4-yl]-4-sulfanylbutanamide 0.815 3 F1H N-(1-benzylpiperidin-4-yl)-4-sulfanylbutanamide 0.800