{HEAD ~ The object} of the invention is to seek and develop {TAIL ~ an oral preparation} of protein or polypeptide drugs especially insulin 
is to seek
{ HEAD ~ The object } of the invention is to seek and develop { TAIL ~ an oral preparation } of protein or polypeptide drugs especially insulin
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH