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