The invention provides novel amino acids and peptides containing them which comprise a dihydropyridine.revreaction.pyridinium salt-type redox system and which provide site-specific and sustained delivery of pharmacologically active peptides to the brain. These new amino acids contain a redox system appended directly or via an alkylene bridge to the carbon atom adjacent to the carboxyl carbon and may be incorporated into a peptide chain at a variety of positions, including non-terminal positions.
本发明提供了一种新型
氨基酸及其所含的肽,其中包括一种
二氢吡啶-盐型氧化还原系统,能够提供药理活性肽在大脑中的特定部位和持续性释放。这些新型
氨基酸直接或通过烷基桥连接到羧基碳旁的碳原子,可在多个位置包括非末端位置上插入到肽链中。