PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
12372512-0	2002	Indoline and piperazine containing derivatives as a novel class of mixed D(2)/D(4) receptor antagonists.	Piperazine	13-23	dopamine receptor D4	Homo sapiens	78-91	
10649982-1	2000	N-[2-[4-(4-Chlorophenyl)piperazin-1-yl]ethyl]-3-methoxybenzamide (1), a high-affinity and selective dopamine D(4) receptor ligand, was chosen as a lead, and structural modifications were done on its amide bond and on its alkyl chain linking the benzamide moiety to the piperazine ring and by preparing some semirigid analogues.	Piperazine	24-33	dopamine receptor D4	Homo sapiens	100-122	
29579709-0	2018	The novel piperazine-containing compound LQFM018: Necroptosis cell death mechanisms, dopamine D4 receptor binding and toxicological assessment.	Piperazine	10-20	dopamine receptor D4	Homo sapiens	85-105