摘要:
Compounds are provided having the following structure: (I) or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof, wherein R2a, R2b, R3a, R3b, R7, R8, R9, L1, L2, G1, G2, G3, b, and c are as defined herein. Use of the compounds as a component of lipid nanoparticle formulations for delivery of a therapeutic agent, compositions comprising the compounds and methods for their use and preparation are also provided.