Fig. 1.

1H NMR spectra of synthesized polymers: on A poly(ε-caprolactone) (PCL), B adipoyl chloride-functionalized PCL, C PEG-PCL-PEG, and D folic acid-functionalized PEG-PCL-PEG
1H NMR spectra of synthesized polymers: on A poly(ε-caprolactone) (PCL), B adipoyl chloride-functionalized PCL, C PEG-PCL-PEG, and D folic acid-functionalized PEG-PCL-PEG