In {HEAD ~ the research} for {TAIL ~ more potent antagonists} of the luteinizing hormone releasing hormone , new peptides with emphasis on arginine in position 8 were designed, synthesized and tested for anti ovulatory activity  
In { HEAD ~ the research } for { TAIL ~ more potent antagonists } of the luteinizing hormone releasing hormone , new peptides with emphasis on arginine in position 8 were designed , synthesized and tested for anti ovulatory activity
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