long-term memory

TTK21 是 CBP p300 组蛋白乙酰转移酶活性的激活剂，与葡萄糖基碳纳米球结合时，可通过血脑屏障，对成人大脑神经发生和长期记忆功能有益。

CaMKIIα-PHOTAC是一种靶向Ca2+ 钙调蛋白依赖性蛋白激酶IIα（CaMKIIα）的光化学靶向嵌合体（PHOTAC）。该分子在特定波长光照射下实现靶蛋白的泛素化及通过蛋白酶体催化的降解。CaMKIIα-PHOTAC能在光照条件下显著降低小鼠海马区域的诱发LTP反应强度，减弱突触功能，并对维护亚细胞级别的树突结构域、长时程增强及记忆能力起到关键作用。

(-)-L-threo-PDMP is an enhancer of ganglioside biosynthesis. The (-)-L-threo-PDMP (1S,2S) isomer is the active stimulatory component of DL-threo-PDMP in contrast to (+)-D-threo-PDMP , which is an inhibitor of glucosylceramide synthetase. (-)-L-threo-PDMP upregulates GM3, GD3, and GQ1b synthase levels, which are glycosyltransferases involved in ganglioside biosynthesis, and increases ganglioside levels in cells. It increases neurite outgrowth and synapse formation in vitro and improves retention of a long-term memory learned prior to forebrain ischemia in rats when administered following ischemia at a dose of 40 mg/kg per day.

BGC20-761 是一种选择性的5-HT6和多巴胺受体 (dopamine receptor) 拮抗剂，对人 5-HT6，5-HT2A，D2 受体的Ki 值分别为 20，69，和 140 nM。BGC20-761 可增强长期记忆。BGC20-761 具有作为抗精神病药物的潜在效用。

MK-0952 is a selective PDE4 inhibitor used to treat long-term memory loss and mild cognitive impairment. It is an intrinsically potent inhibitor and has shown limited whole blood activity.