Figure 4.
Molecular structure of (a) HEC (DS = 1.75); (b) HPC (molar substitution [MS] = 4); (c) HPMC (hydroxypropyl DS = 0.25 and methoxyl DS = 1.5); (d) MC (DS = 1.75); (e) CMCNa (DS = 1) [45].
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