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 shellac, cetyl alcohol, and {TAIL ~ cellulose acetate} 
as
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 shellac , cetyl alcohol , and { TAIL ~ 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 OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL