{HEAD ~ These compounds} are useful in {TAIL ~ the treatment} of diseases of the central nervous system, the cardiovascular system, the pulmonary system, the gastrointestinal system and the endocrinologic system 
are useful in
{ HEAD ~ These compounds } are useful in { TAIL ~ the treatment } of diseases of the central nervous system , the cardiovascular system , the pulmonary system , the gastrointestinal system and the endocrinologic system
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH