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