LY 341495 has been shown to be a highly potent and selective group II metabotropic glutamate receptor (mGluR-2) antagonist with Ki / IC50 values are 2.3, 1.3, 173, 990, 6800, 8200 and 22000 nM for human mGluR-2, mGluR-3, mGluR-8 , mGluR-7a, mGluR-1a, mGluR-5a and mGluR-4a.
MPEP is a potent and highly selective non-competitive antagonist at the mGlu5 receptor subtype (IC50 = 36 nM) and a positive allosteric modulator at mGlu4 receptors.
MPEP is a potent, highly selective non-competitive antagonist at the mGlu5a receptor subtype (IC50 = 36 nM) while having no agonist or antagonist activities at the mGlu1b receptor at concentrations up to 30 uM.
DL-AP3, a racemic preparation of D-AP3 and L-AP3, is an inhibitor of phosphoserine phosphatase and an antagonist of the metabotropic glutamate receptor (mGluR), blocking phosphoinositide turnover mediated by the mGluR.
LY3020371 hydrochloride is a potent, selective metabotropic glutamate 2/3 receptor (mGlu2/3) antagonist with Ki of 5.3 and 2.5 nM, potently blocks cAMP formation with IC50 of 16.2 nM.
Fenobam is a selective, orally active, and non-competitive mGluR5 antagonist acting at an allosteric modulatory site (Kd values are 54 and 31 nM for rat and human recombinant mGlu5 receptors, respectively).
JNJ16259685 is a selective antagonist of mGlu1 receptor, and inhibits the synaptic activation of mGlu1 in a concentration-dependent manner with IC50 of 19 nM.
FTIDC is an orally active, noncompetitive, selective allosteric metabotropic glutamate receptor (mGluR) 1 antagonist with an IC50 of 5.8 nM for human mGluR1a.
Auglurant (VU0424238) is a novel and selective mGlu5 antagonist with an IC50 value of 11 nM (rat) and an IC50 value of 14 nM (human). Auglurant (VU0424238) has an acceptable CNS penetration.
NPS2390 is a group I mGlu antagonist. It displays noncompetitive antagonist activity at both mGlu1 and mGlu5 receptors. NPS2390 is thought to act on a site separate from the glutamate binding pocket.