Fig. 2From: Anti-tumor Study of Chondroitin Sulfate-Methotrexate Nanogels 1H NMR spectra of CS, MTX, and CS-MTX. a 1H NMR spectra of CS; CS was dissolved in D2O. b 1H NMR spectrum of MTX; MTX was dissolved in dimethyl sulfoxide-d6. c 1H NMR spectrum of CS-MTX; CS-MTX was dissolved in D2OBack to article page