Sialic acid derivatives represented by the following general formula:
wherein R1 represents a residue of a steroid compound excluding cholestane and cholestene residues, R2 represents hydrogen or methyl group, R3 represents a C1-C6 alkyl group and other, R4 represents hydrogen or acyl group, R5 represents a group of R15O- (R15 represents a C2-C7 acyl group and other), and X represents oxygen or sulfur atom, and their derivatives. These derivatives have activating effect on choline acetyltransferase activity in the chlonergic neurons, and are useful for preventive and therapeutic treatment of dementia, memory disorder, peripheral nervous disorder and so forth.
由以下通式代表的
硅烷酸衍
生物:
其中 R1 代表类
固醇化合物的残基,不包括胆甾烷和胆甾烯残基;R2 代表氢或甲基;R3 代表 C1-C6 烷基及其他;R4 代表氢或酰基;R5 代表 R15O-(R15 代表 C2-C7酰基及其他);X 代表氧原子或
硫原子;以及它们的衍
生物。这些衍
生物对
胆碱能神经元中的
胆碱乙酰转移酶活性有激活作用,可用于痴呆、记忆障碍、周围神经紊乱等疾病的预防和治疗。