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(A) Schematic illustration of the synthesis of Me-HA and MOHA. (B) 1H NMR spectra of synthesized Me-HA and MOHA in D2O. (i) Vinyl groups of the Me-HA and MOHA identified at ~5.6 and 6.1 ppm; (ii) methyl groups located at ~1.85 ppm; (iii) methyl in N-acetyl glucosamine found at ~1.95 ppm.
