An object of the present invention is therefore to provide {HEAD ~ novel compounds} having {TAIL ~ an affinity} for the lungs 
An object of the present invention is therefore to provide { HEAD ~ novel compounds } having { TAIL ~ an affinity } for the lungs
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH