Before revision: A: 1st Generation thiomers characterized by free thiol groups – chemical structure of a chitosan-thioglycolic acid conjugate B: 2nd Generation thiomers characterized by S-protection of high reactivity for thiol-disulfide exchange reactions – chemical structure of a with mercaptonicotinic acid S-protected thiolated xanthan gum C: 3rd Generation thiomers characterized by S-protection of low reactivity for thiol-disulfide exchange reactions – chemical structure of a with N-acetyl-cysteine S-protected thiolated hyaluronic acid Thiolated polymers designated thiomers are functional polymers used in biotechnology product development with the intention to prolong mucosal drug residence time and to enhance absorption of drugs.
After revision:  Thiolated polymers designated thiomers are functional polymers used in biotechnology product development with the intention to prolong mucosal drug residence time and to enhance absorption of drugs.