A comprehensive SAR study of a putative TLR 3/8/9 agonist was conducted. Despite the excitement surrounding the potential of the first small molecule TLR3 agonist with a compound that additionally displayed agonist activity for TLR8 and TLR9, compound 1 displayed disappointing activity in our hands, failing to match the potency (EC₅₀) reported and displaying only a low efficacy for the extent of stimulated NF-κB activation and release. The evaluation of >75 analogs of 1, many of which constitute minor modifications in the structure, failed to identify any that displayed significant activity and none that exceeded the modest activity found for 1.

对推定的 TLR 3/8/9 激动剂进行了综合 SAR 研究。尽管第一个小分子 TLR3 激动剂的潜力令人兴奋，该化合物还显示出对 TLR8 和 TLR9 的激动剂活性，但化合物1在我们手中显示出令人失望的活性，未能与报告的效力 (EC ₅₀ ) 相匹配并且仅显示低对刺激的 NF-κB 活化和释放程度的功效。对1的 >75 个类似物的评估，其中许多构成结构的微小修改，未能识别出任何表现出显着活性的物质，并且没有发现超过1的适度活性。