L 741742 is an effective and highly selective antagonist of the D4dopaminereceptor (Ki: 1700, 770, and 3.5 nM at cloned human D2, D3, and D4receptors).
SRA880 is a non-peptide somatostatin sst(1) receptor antagonist which displays a significantly lower affinity for the other human recombinant somatostatin receptors ( pK(d)= 6.0) or a wide range of neurotransmitter receptors, except for the humandopamine
SRA880 is a non-peptide antagonist of somatostatin sst1-receptor. SRA880 displayed significantly lower affinity for the other human recombinant somatostatin receptors ( pK(d) < or = 6.0). SRA880 shows a certain binding affinity to the humandopamineD4 re
U-101958 Maleate is a ligand of dopamineD4receptor. U-101958 Maleate also binds to a large sigma1 receptor-like component in SK-N-MC neuroblastoma cells and human cerebellum with high affinity.
N-Despropyl ropinirole is an active metabolite of the dopamine D2 receptor agonist ropinirole. It increases extracellular acidification rates in CHO cells expressing humandopamine D2, D3, and D4receptors (EC50s = 0.63, 0.063, and 1.23 µM, respectively). N-Despropyl ropinirole is also a potential impurity found in commercial preparations of ropinirole.