Fig. 1From: Novel CD44-targeting and pH/redox-dual-stimuli-responsive core–shell nanoparticles loading triptolide combats breast cancer growth and lung metastasisa Synthesis route of HA-VE conjugate. b 1H NMR spectra of HA, VE, and HA-VE in DMSO-d6. c Synthesis route of PBAEss copolymer. d 1H NMR spectra of HDD, BACy, 4-amino-1-butanol, and PBAEss in CDCl3Back to article page