A variety of materials can be used for such enteric layers or coatings, such materials including a number of polymeric acids and {HEAD ~ mixtures} of {TAIL ~ polymeric acids} with such materials as shellac, cetyl alcohol, and cellulose acetate 
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A variety of materials can be used for such enteric layers or coatings , such materials including a number of polymeric acids and { HEAD ~ mixtures } of { TAIL ~ polymeric acids } with such materials as shellac , cetyl alcohol , and cellulose acetate
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