PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 14552781-1 2003 Incorporation of substituted phenyl piperazine privileged structures into a known MC4 specific dipeptoid consensus sequence resulted in a series of potent (EC(50)=24 nM) and selective MC4-R agonists. phenylpiperazine 29-46 melanocortin 4 receptor Homo sapiens 184-189 18220971-0 2008 Studies on the structure-activity relationship of the basic amine of phenylpiperazines as melanocortin-4 receptor antagonists. phenylpiperazine 69-86 melanocortin 4 receptor Homo sapiens 90-113