The disclosure provides ionizable amine lipids and salts thereof (e.g., pharmaceutically acceptable salts thereof) useful for the delivery of biologically active agents, for example delivering biologically active agents to cells to prepare engineered cells. The ionizable amine lipids disclosed herein are useful as ionizable lipids in the formulation of lipid nanoparticle-based compositions.
Synthesis and antitumour activity of β-hydroxyisovalerylshikonin analogues
作者:Zhen Rao、Xin Liu、Wen Zhou、Jing Yi、Shao-Shun Li
DOI:10.1016/j.ejmech.2011.05.065
日期:2011.9
β-hydroxyisovalerylshikonin analogues bearing oxygen-containing substituents at the side-chain hydroxyl of shikonin were designed and synthesized. The cytotoxicities of these compounds were evaluated in vitro against multi-drug resistant (MDR) cell lines DU-145 and HeLa. Most compounds exhibited significant inhibitory activity on both cell lines. The structure–activity relationship showed the analogues with ether substituents