BIBO3304 is a selective NPY Y1 receptor antagonist (IC50 values are 0.38 and 0.72 nM at human and rat receptors respectively). BIBO3304 inhibits NPY- and fasting-induced feeding in vivo following central administration.
BIBP3226 TFA is an effective and selective antagonist of neuropeptide Y Y1 (NPY Y1) and neuropeptide FF (NPFF) receptor (Kis: 1.1, 79, and 108 nM for rNPY Y1, hNPFF2, and rNPFF).