There are disclosed various substituted 4-amino-3-pyridinol compounds of the formula below, ##STR1## where R.sub.1, R.sub.2 and R.sub.3 are as defined in the specification, which are useful for alleviating various memory dysfunctions characterized by a cholinergic deficit such as Alzheimer's disease.
                            以下公式所示的各种取代的4-
氨基-3-
吡啶醇化合物被披露,其中R.sub.1,R.sub.2和R.sub.3如规范所定义,这些化合物对于缓解由
胆碱能缺陷表征的各种记忆功能障碍,如阿尔茨海默病,是有用的。