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Schematic structure of dual-labeled polymer carriers with Dyomics-782 bound via a non-degradable hydrazide bond and Dyomics-676 bound via a pH-sensitive hydrazone bond—(A) linear N-(2-hydroxypropyl)methacrylamide (HPMA)-based polymer and (B) star HPMA-based polymer. Reprinted with permission from [31], Copyright [2012], American Chemical Society.
